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  • Membrane-less enzymatic fuel cell operated under acidic conditions
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-16
    L.A. Bojórquez-Vázquez, U. Cano-Castillo, R. Vazquez-Duhalt

    The demand of new and environmentally friendly energy sources has induced the research and development of technologies for the energy generation from organic compounds. Among these strategies of energy production by bioelectrochemical systems the enzymatic fuel cells show several potential applications including as power suppliers for non-invasive and implantable medical devices. In this work, a new membrane-less enzymatic biofuel cell based on mediated electron transfer glucose oxidase-anode and direct electron transfer laccase-cathode operated in acidic conditions has been designed and characterized. Both, glucose oxidase/hydroquinone anode and laccase cathode were obtained by enzyme covering on gold electrodes modified with single-walled carbon nanotubes. The maximal current density generated was 3.87 and 2.36 mA cm−2 for the anode and cathode, respectively. The glucose/O2 biofuel cell showed an OCV of 0.52 V and delivered a maximum power density of 0.24 mW cm−2 at 0.27 V in acidic pH conditions. This performance is the higher reported so far without added cofactor to the electrolyte in acidic conditions.

    更新日期:2018-10-17
  • Efficient electrochemical detection of guanine, uric acid and their mixture by composite of nano-particles of lanthanides ortho-ferrite XFeO3 (X = La, Gd, Pr, Dy, Sm, Ce and Tb)
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-17
    Yogendra Kumar, Susmita Pradhan, Susmita Pramanik, Rajib Bandyopadhay, Dipak Kumar Das, Panchanan Pramanik
    更新日期:2018-10-17
  • Quantification of triethanolamine through measurement of catalytic current in alkaline iron-d-gluconate solution
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-17
    Margit Lenninger, Noemi Aguilo-Aguayo, Thomas Bechtold

    Triethanolamine is widely used in cosmetics1 and detergent formulations. Through its negative redox potential of −1050 mV (vs. Ag/AgCl, 3 M KCl) the Fe(II/III)-triethanolamine complex also is of interest as electrolyte in redox-flow batteries. Thus an analytical method to determine triethanolamine concentrations in complex formulations is of distinct technical value. In cyclic voltammetry a catalytic current is observed when Fe(III)-triethanolamine complexes are reduced in presence of an excess Fe(III)-d-gluconate. The catalytical regeneration of the Fe(III)-triethanolamine complex occurs at its characteristic cathodic peak potential (Ep)c of −1050 mV and thus permits analytical determination of low triethanolamine concentrations. In CV experiments a linear relationship between triethanolamine concentration and (Ep)c at −1050 mV was observed for triethanolamine concentrations between 0.05 and 1 mM in an electrolyte containing 15 mM Fe(III)-d-gluconate and 0.4 M NaOH. As an example, electrolytes from an all‑iron redox-flow cell were analysed for possible transfer of triethanolamine through the ion exchange membrane. The standard addition method was used to minimise matrix effects on the determination of the cathodic peak currents (Ip)c. The new method permits a direct analysis of triethanolamine concentration without extensive sample preparation or highly specialised equipment. This makes the technique useful as a routine method for triethanolamine analysis in a wide range of technical applications.

    更新日期:2018-10-17
  • Metal-organic framework-74-Ni/carbon nanotube composite as sulfur host for high performance lithium-sulfur batteries
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-17
    Guodong Xu, Yuxiang Zuo, Bing Huang

    In this paper, metal-organic framework-74-Ni/carbon nanotube (MOF-74-Ni/CNT) composite was synthesized via one-pot in situ hydrothermal reaction. The MOF-74-Ni/CNT was characterized and the electrochemical performance was investigated. The composite sulfur cathode prepared by impregnation method delivers a high initial discharge capacity, good rate capability and a low capacity decay of 0.087% per cycle over 400 cycles at 2 C. The significant electrochemical performance was attributed to the combination of the high affinity of MOF-74-Ni to polysulfide anions and the excellent electronic conductivity of carbon nanotube. These results suggest the design of high polar MOF materials with high conductive CNT is an effective strategy to construct a promising sulfur host for Li-S batteries.

    更新日期:2018-10-17
  • Use of carbon paste electrodes as a novel strategy to study adsorption mechanism of silver ions onto functionalized grapefruit peel
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-14
    Luis A. Romero-Cano, Helena García-Rosero, Monsalud del Olmo-Iruela, Francisco Carrasco-Marín, Linda V. González-Gutiérrez
    更新日期:2018-10-15
  • High-efficient preparation and screening of electrocatalysts using a closed bipolar electrode array system
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-13
    Jia-Dong Zhang, Nan Hao, Lei Lu, Shan Yun, Xiu-fang Zhu, Kun Hong, Liang-Dong Feng
    更新日期:2018-10-14
  • 更新日期:2018-10-12
  • Electrochemical bisphenol A sensor based on nanoporous PtFe alloy and graphene modified glassy carbon electrode
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-11
    Chunhuan Tian, Dandan Chen, Nali Lu, Yao Li, Rongjing Cui, Zhida Han, Genhua Zhang

    Bimetallic nanoporous alloys have attracted considerable attention for electrochemical sensor applications due to their excellent electrocatalytic activity and structural stability. In the present work, nanoporous PtFe (NP-PtFe) alloy was fabricated by chemical dealloying ternary PtFeAl alloy ribbons. The structure and morphology of NP-PtFe alloy was characterized by scanning electronmicroscopy, transmission electron microscopy and X-ray diffraction. A highly sensitive and selective biosensor based on NP-PtFe alloy and graphene was successfully developed for direct detection of bisphenol A. Under optimal conditions, the proposed sensor showed an efficient electrocatalytic activity towards the redox of bisphenol A. Differential pulse voltammetry was applied to the electrochemical determination of bisphenol A with a wide linear concentration range from 0.2 μM to 96 μM and a low limit of detection of 0.17 μM (S/N = 3). This strategy provides a novel and simple approach for sensitive and selective detection of bisphenol A, holding promising applications in the determination of organic pollution in real water samples.

    更新日期:2018-10-11
  • Optimized lead carbon composite for enhancing the performance of lead-carbon battery under HRPSoC operation
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-11
    Jian Yin, Nan Lin, Zheqi Lin, Yue Wang, Jun Shi, Jinpeng Bao, Haibo Lin, Wenli Zhang
    更新日期:2018-10-11
  • MXene/CNTs films prepared by electrophoretic deposition for supercapacitor electrodes
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-11
    L. Yang, W. Zheng, P. Zhang, J. Chen, W.B. Tian, Y.M. Zhang, Z.M. Sun

    Binder-free Ti3C2 MXene/carbon nanotubes (Ti3C2/CNTs) films were successfully deposited onto graphite paper via electrophoretic deposition (EPD) method for supercapacitor electrodes. The as-prepared Ti3C2/CNTs electrode exhibits enhanced specific capacitance, approximately 1.5 times and 2.6 times of that of pristine Ti3C2 and CNTs films, respectively. Impressively, Ti3C2/CNTs electrodes demonstrate excellent cycling stability, without capacitance decay over 10,000 cycles. Incorporation of CNTs into MXene builds a robust structure, preventing MXene from restacking, and thus leading to the enhanced electrochemical performance. These results suggest that robust Ti3C2/CNTs films can be prepared by a simple yet effective EPD method, potentially applicable to other hybrid MXene systems.

    更新日期:2018-10-11
  • Electrochemical codeposition of silver-gold nanoparticles on CNT-based electrode and their performance in electrocatalysis of dopamine
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-09
    Adina Arvinte, Irina-Alexandra Crudu, Florica Doroftei, Daniel Timpu, Mariana Pinteala
    更新日期:2018-10-10
  • An electrochemical biosensor for sensitive detection of nicotine-induced dopamine secreted by PC12 cells
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-10
    Chen Yang, Meng-Meng Liu, Feng-Qiao Bai, Zi-Zhen Guo, Hui Liu, Guang-Xian Zhong, Hua-Ping Peng, Wei Chen, Xin-Hua Lin, Yun Lei, Ai-Lin Liu

    A facile, sensitive and selective electrochemical biosensor for the detection of dopamine (DA) released from nicotine-stimulated PC12 cells was fabricated by using a poly-celestine blue (CB) modified glassy carbon electrode (GCE). The poly-CB film was prepared by controlled electropolymerization and has about 5 nm thick on the GCE surface. In the optimal experimental condition, the poly-CB modified GCE showed excellent electrocatalytic activity toward the oxidation of DA. The response signal obtained by differential pulse voltammetry displayed a good linear relationship between the current response signal and the DA concentrations in range from 10 nmol L−1 to 0.7 μmol L−1 and 1 μmol L−1 to 10 μmol L−1 with a detection limit of 1.2 nmol L−1 (S/N = 3) and sensitivity of 17.0134 μA cm2 μM−1. In addition, the poly-CB modified GCE has successfully been applied to determine nicotine-induced dopamine released from PC12 cells with satisfactory recovery. The developed method held great potential for the detection of dopamine in biological samples and would bring great convenience to the diagnosis of diseases associated with deficiency in dopamine.

    更新日期:2018-10-10
  • Electrochemical detection of Zn(II)-induced amyloid-β aggregation: Insights into aggregation mechanisms
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-10
    Elena V. Suprun, Sergey P. Radko, Sergey A. Kozin, Vladimir A. Mitkevich, Alexander A. Makarov
    更新日期:2018-10-10
  • A sensitive DNAzyme-based electrochemical sensor for Pb2+ detection with platinum nanoparticles decorated TiO2/α-Fe2O3 nanocomposite as signal labels
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-09
    Xianjiu Liao, Jianjun Luo, Jing Wu, Taotao Fan, Yao Yao, Fenglei Gao, Yong Qian

    In this work, a sensitive DNAzyme-based electrochemical sensor had been developed for Pb2+ detection with platinum nanoparticles decorated TiO2/α-Fe2O3 composite as signal labels. The morphological and compositional properties of the PtNPs/TiO2/α-Fe2O3 were examined by using transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The result showed that the shape of α-Fe2O3 nanocrystals were the cubic, the average length ranged from 150 to 300 nm, and the PtNPs with about 3–4 nm in diameter were well dispersed on the surface of TiO2/α-Fe2O3. TiO2/α-Fe2O3 were used as a “carrier” to load the PtNPs tracers as well as for Apt3 immobilization. In turn, the DNAzyme structure of Apt1 and Apt2 was immobilized on the gold electrode surface as the capture probes. Subsequently, DNAzyme modified electrodes reacted with target Pb2+ and the Apt3/PtNPs/TiO2/α-Fe2O3 composite were deposited on the electrode surface. The performance of the DNAzyme-based electrochemical sensor was tested by recording the electrocatalytic reduction current toward H2O2. Enhanced sensitivity was achieved by TiO2/α-Fe2O3 nanocomposites as a nanocarrier in order to PtNPs at a high ratio. The DNAzyme-based electrochemical sensor described here exhibited excellent sensitivity and specificity for target ion. This work represented a promising potential for on-site testing Pb2+ in real drinking water and serum sample analysis.

    更新日期:2018-10-09
  • 更新日期:2018-10-09
  • Three-dimensional porous Ni-CNT composite nanocones as high performance electrocatalysts for hydrogen evolution reaction
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-09
    Gh. Barati Darband, M. Aliofkhazraei, A. Sabour Rouhaghdam
    更新日期:2018-10-09
  • A comprehensive study on the kinetic aspects and experimental design for the voltammetric response of a Sn(IV)-clinoptilolite carbon paste electrode towards Hg(II)
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-07
    Tahmineh Tamiji, Alireza Nezamzadeh-Ejhieh

    The Sn(IV) ion exchanged clinoptilolite nanoparticles (Sn(IV)-CNP) were used as a modifier for the modification of carbon paste electrode (CPE). When the modified electrode was immersed in HCl supporting electrolyte, Sn(IV) cations can locate at the Sn(IV)-CNP-CPE electrode surface via an ion exchange process with protons of the supporting electrolyte. These electroactive cations underwent a redox process at the electrode surface. Increased peak current of Sn(IV) reduction by adding Hg(II) analyte into the supporting electrolyte solution was used for the voltammetric determination of Hg(II). Focus of the work was on study of the interaction effects between the influencing variables in square wave voltammetric response of the modified electrode in the presence of Hg(II) cations by designing the experiments (via response surface methodology: RSM) and study of some kinetic aspects of the process in linear sweep voltammetry and chronoamperometry. The optimal run in RSM was obtained in: Csn(IV) in ion exchange solution: 0.37 mol L−1, modifier%: 22.45, amplitude: 60 mV and step potential: 2.9 mV. The response current of the modified electrode was proportion to Hg(II) concentration in the range of 0.1–10 μM (DL: 0.05 μM) in square wave voltammetry and in the range of 0.1–10 μM (DL: 0.01 μM) in chronoamperometry. Using the Tafel plots, the values of α and Ko were determined for the modified electrode as 0.298, 1.91 × 10−3 s−1 and 0.311, 6.62 × 10−3 s−1 in the absence and presence of Hg(II) cations, respectively.

    更新日期:2018-10-08
  • Synthesis and optoelectronic properties of novel alternate copolymers based on diketopyrrolopyrrole and triarylamine units spaced by flexible chain
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-07
    Ye Chen, Qingyi Lu, Laixu Gao, Xu Zhang, Caiyu Yang, Wanan Cai, Guoliang Pang, Haijun Niu, Wen Wang, Yanjun Hou, Yanhong Zhang
    更新日期:2018-10-08
  • Influence of the calcination temperature and ionic liquid used during synthesis procedure on the physical and electrochemical properties of Ti/(RuO2)0.8–(Sb2O4)0.2 anodes
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-08
    Marcel O. Santos, Géssica de O. S. Santos, Silvana Mattedi, Sandro Griza, Katlin I.B. Eguiluz, Giancarlo R. Salazar-Banda

    The development of synthesis methods to produce efficient anodes for wastewater treatment systems is an important industrial issue. Here, we describe the synthesis and the physical and electrochemical characterization of Ti/(RuO2)0.8–(Sb2O4)0.2 anodes prepared by thermal decomposition. The electrodes were prepared using three calcination temperatures (500, 550 and 600 °C) and using 2-hydroxyethylammonium acetate (2HEAA) and methyl-imidazolium hydrogensulfate ((HMIM)HSO4) ionic liquids (IL) as solvents for the precursors solutions. Both ionic liquids used were characterized in terms of water content and viscosity. The 2HEAA IL is almost 10 times more viscous than the (HMIM)HSO4 IL. The anodes developed were electrochemically characterized by cyclic voltammetry, morphology factor, electrochemical impedance spectroscopy and accelerated service lifetime tests. The electrodes synthesized using the 2HEAA IL have superior electrocatalytic properties and electrochemical stability than those made using the (HMIM)HSO4 IL. In addition, the anodes made using the 2HEAA IL as solvent have more homogenous surfaces and higher crystallinity degree than those made using the (HMIM)HSO4 IL. Among the studied calcination temperatures, combining 550 °C and the 2HEAA IL results in more compact and rough electrode surfaces with the highest electroactive areas and electrochemical stability. Thus, the temperature of 550 °C is suitable for the synthesis of mixed metal oxide (MMO) anodes. The electrodes synthesized using the 2HEAA IL are more efficient in the electrochemical oxidation of the Reactive Yellow 186 dye than those made using the (HMIM)HSO4 IL. Consequently, the viscosity of the IL used has great influence on the performance of the synthesized anodes. In addition, the high viscosity of the 2HEAA IL results in a lower number of calcinations steps to produce the anodes and, hence, lower production cost. Viscous ionic liquids are therefore promising for the production of MMO anodes via thermal decomposition methods.

    更新日期:2018-10-08
  • 更新日期:2018-10-06
  • Two-dimensional nickel hydroxide nanosheets with high-content of nickel(III) species towards superior urea electro-oxidation
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-06
    Dongsheng Wang, Siwen Liu, Qiuping Gan, Jianniao Tian, Tayirjan Taylor Isimjan, Xiulin Yang
    更新日期:2018-10-06
  • A thermodynamic understanding of horizontal pores formation in anodized doped aluminum with alloying elements
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-05
    A.M. Mebed, Alaa M. Abd-Elnaiem

    Although there is a plenty of work in many publications concerning three-dimensional (3D) pore formation by an anodization process, though no definitive conclusion has been given to the mechanism of its formation. Accordingly, the process of 3D architecture is still a subject of considerable debate. The aim of the present study is to extend the previous findings, bringing out the relationship between different components such as the thermodynamic role of the precipitations mechanism in dilute aluminum (Al) alloy at the alloy/film interface, film thickness, anodizing potential and the resulting porous anodic alumina (PAA) film morphology. Dislocation movement following Orowan mechanism and its role in enriching layer formation is connected for the first time in explaining the formation of the enriched layer. Consequently, the precise disruption of the 3D morphologies within the anodic films is developed. The distributions of copper (Cu) spices in the alloy as well as within the enriched layer on the Alloy/film surface are carefully investigated and explained using different experimental techniques. In addition, the Oxygen generation is explored. The present study is designed to reveal the influences of impurities on the PAA architecture. It has the advantage of being a direct explanation for the mechanism of the defect in the PAA and its incorporation into the anodic film throughout the anodic film. Moreover, a reliable explanation for current density oscillation is explored. That help to gain further understanding of this phenomenon to control PAA structure in thermodynamically similar alloys. Based on the present study, free Cu atoms in solid solution are swept driven by vacancies according to Orowan interface during anodization forming an enriched ~2 nm layer of Cu just beneath the anodic film. The copper is not significantly incorporated into the anodic film before the formation of θ′ precipitates in a thick film; whereas of thickness <500 nm, the Cu atom migrates outward forming patterned precipitates rest at the surface for the thin film. The concentration of θ′ precipitates is calculated and found ~9 × 1015 m−3. Accordingly, the Cu incorporation into the anodic film and 3D structure mechanism are correctly explored.

    更新日期:2018-10-05
  • Anodic stripping voltammetry of silver in the absence of electrolytes: Theory and experiment
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-04
    Kamonwad Ngamchuea, Christopher Batchelor-McAuley, Richard G. Compton

    This work demonstrates that anodic stripping voltammetry at a microdisc electrode allows the detection of silver in the absence of added supporting electrolyte. The voltammetry however becomes distorted under low-support conditions. A semi-analytical model is developed to investigate the effects of the lack of supporting electrolyte on the voltammetric responses. First, the alteration in the double-layer kinetics is studied. In particular, we show that the classical Frumkin correction cannot explain the distorted shape of the voltammetry and only accounts for no more than ~50% of the shift in the voltammetric peaks. Second, compared to the Frumkin correction, Ohmic drop contributes much more significantly to the shift in the peak potential and the distorted wave shape upon lowering electrolyte concentrations. The Ohmic drop determined on the basis of predicted constriction resistance as expressed by Newman gives a reasonable approximation to the solution resistances, especially at ionic strengths above 200 μM. In deionized water or ultra-low conductivity water with the ionic strength of sub-micromolar level, a discrepancy in the resistances of up to a factor of 25 was observed. This discrepancy likely arises due to the assumptions made in applying the Newman model to the experimental system. Finally, we show that a model which considers simultaneously the electrode kinetics and the ohmic drop effects give a consistent fit with experimental data, when the values of the resistances are appropriately adjusted to account for the inaccuracy in the approximation of constriction resistances.

    更新日期:2018-10-04
  • Intermediate oxidation states of technetium in alkaline solutions
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-03
    M. Chotkowski, M. Grdeń, B. Wrzosek

    The electrochemical reduction of pertechnetate ions (TcO4−) have been studied in strongly alkaline media (0.3 ÷ 10 M aqueous NaOH) using electrochemical (cyclic voltammetry (CV); chronoamperometry (CA), chronopotentiometry (CP)) and spectroelectrochemical (UV-Vis OTTLE and Au-SERS) techniques. Such obtained results show formation of two types of Tc(V) species as intermediates in the electrochemical reduction of the pertechnetates. The soluble Tc(V) forms, detected by means of UV-Vis measurements are relatively stable but disproportionate to Tc(IV) and Tc(VII). The other type of Tc(V) containing products is present at the electrode surface. The latter species were detected and characterized by a band at 700 cm−1. The final products of the multistep reduction of the pertechnetates in NaOHaq are Tc(IV) compounds which composition depends on the electrolyte concentration. Thus, insoluble and adsorbed in the electrode surface TcO2 is the main product in 0.3 M NaOH while soluble polymeric Tc(IV) are the prevailing species observed in 10 M NaOH.

    更新日期:2018-10-04
  • Improved electrochemical performance of metal doped Zirconia nanoparticles for detection of Ochratoxin-A
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-03
    Pramod K. Gupta, Zishan H. Khan, Pratima R. Solanki

    Here, aluminum (Al) doped Zirconia nanoparticles (ZrO2 NPs) were proposed as a novel material for the fabrication of an efficient electrochemical immunosensor. X-ray diffraction (XRD) analysis and high resolution–transmission electron microscopy (HR-TEM) images visualized phase stabilization and generation of oxygen deficiency in the ZrO2 NPs due to doping of Al ions (Al3+) in ZrO2 lattice. On the increase in Al3+ concentration, a sequential decrease in crystallite size of ZrO2NPs describes the Zener pinning effect. Further increase in Al3+concentration (beyond 11 mol%) terminated crystallinity of ZrO2 NPs. The generated oxygen deficiency due to Al3+ doping increased the surface charge and hydrophilicity of ZrO2 NPs as observed by zeta potential and contact angle measurements, respectively. Moreover, oxygen deficiency was the main reason for the remarkable enhancement in the electrochemical behavior of Al3+ doped ZrO2 NPs, and maximum was observed for 7 mol% Al3+ doped ZrO2 NPs. Thus, 7 mol% Al3+ doped ZrO2 NPs based Al3+-ZrO2/ITO electrodes were fabricated via electrophoretic deposition and further functionalized with antibodies specific to Ochratoxin A (anti-OTA) and bovine serum albumin (BSA). Fabricated BSA/anti-OTA/Al3+-ZrO2/ITO immunoelectrode showed improved sensitivity of 34.07 μA (log ng mL−1)−1 and LOD of 0.14 ng mL−1 in the detection range of 1–10 ng mL−1 as compared to BSA/anti-OTA/ZrO2/ITO immunoelectrode for the detection of OTA. Moreover, recovery of OTA from the spiked sample was observed in the range of 93.3–99.2% with maximum RSD of 4.86.

    更新日期:2018-10-04
  • Solvothermal preparation of Al/Fe-doped V6O13 as cathode materials for lithium-ion batteries with enhanced electrochemical performance
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-02
    Xingyu Wu, Zhengguang Zou, Shengyu Li, Qian Yang

    Al/Fe-doped V6O13 is synthesized via a solvothermal method using V2O5, C2H5OH, Al(NO3)3·9H2O and Fe(NO3)3·9H2O as raw materials. Results of XRD show that different Al/Fe-doped amounts of V6O13 are successfully synthesized. Figures of SEM reveal different morphologies of Al/Fe-doped V6O13. Charge- discharge results indicate that the suitable Al/Fe-doping can improve the electrochemical performance of the material. When the mole ratio of Al/Fe is 5.33/4.95, the average width of the sample is 200 nm and the average length is 4.8 μm. This morphology can shorten the transport path of lithium ions. Meanwhile, the initial discharge specific capacity of the sample is 426.9 mAh/g, which increases by 52% compared to pure phase. The suitable Al/Fe-doping is also conducive to reducing the charge transfer resistance and increasing the diffusion rate of lithium ions. The current research results show that Al/Fe-doped V6O13 has potential application value in cathode material of lithium-ion batteries.

    更新日期:2018-10-03
  • 更新日期:2018-10-03
  • Polyaniline–derived metal–free hollow nitrogen–doped carbon microspheres as an efficient electrocatalyst for supercapacitors and oxygen reduction
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-02
    Mobashar Hassan, Dandan Wu, Xuedan Song, Weiwei Qiu, Qing Mao, Suzhen Ren, Ce Hao
    更新日期:2018-10-03
  • The effect of anodization conditions on the morphology of porous tungsten oxide layers formed in aqueous solution
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-02
    Karolina Syrek, Leszek Zaraska, Marta Zych, Grzegorz D. Sulka
    更新日期:2018-10-03
  • Hydrothermal synthesis of high specific capacity Al/Na co-doped V6O13 cathode material for lithium-ion battery
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-02
    Ting-ting Lv, Zheng-guang Zou, Yan-wei Li, Sheng-yu Li, Yan-jiao Zhang
    更新日期:2018-10-03
  • The electrochemical reduction kinetics of oxygen in dimethylsulfoxide
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-02
    Ruba Hendi, Peter H. Robbs, Beatrice Sampson, Ryan Pearce, Neil V. Rees
    更新日期:2018-10-03
  • 更新日期:2018-10-03
  • Clarification of performance degradation of 20 ah LIB pouch cell after use in electric bus
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-02
    Yong-Nam Cho, Keebum Hwang, Chung-Ho Bae, Jaekwang Kim, Ilbok Lee, Nayoung Kim, Junghoon Ahn, Jun-Ho Song, Songhun Yoon

    Herein, performance degradation of pouch type of 20 A h lithium ion battery from electric bus is clarified after a classification using the resistance value from A to D grade. The obtained cells are carefully disassembled to produce cathode, anode, and separator. Scanning electron microscopy and energy dispersive spectroscopy analysis reveal that morphological change of electrode mostly occur in the anodes surface in D-grade cells, while cathodes of all the grades mostly remain similar. Although the change of crystalline structure of all electrodes is negligible, a growth of solid-electrolyte interphase film mostly happen in the D-grade anodes, which is confirmed by X-ray photoelectron spectroscopy analysis. Furthermore, the degradation of cycle and rate performance happen in the anode of D-grade cells, whereas the cathodes remain invariant irrespective of grade. Furthermore, the disassembled separators exhibit that the Gurley number of separators is commonly increased in the used cells.

    更新日期:2018-10-03
  • 更新日期:2018-10-03
  • Electrochemical energy storage of silver and silver oxide thin films in an aqueous NaCl electrolyte
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-10-03
    Alex I. Oje, A.A. Ogwu, Mojtaba Mirzaeian, Nathaniel Tsendzughul

    We present an investigation into the pseudo-capacitive energy storage potential of silver (Ag) and silver oxide (Ag2O) thin film electrode materials prepared by reactive magnetron sputtering. The growth mode and morphology of the prepared films were investigated using the scanning electron microscope (SEM), which reveals columnar growth structure and microporous sites.The stoichiometry and oxidation states of the silver oxide films were monitored with X-ray diffraction analysis (XRD), X-ray photoelectron spectroscopy (XPS) and Fourier transform infra-red spectroscopy (FTIR). The XRD results reveal the nano-crystalline nature of the silver and silver oxide thin films with peak intensities indexed at (111) planes.Static and dynamic Contact angle measurements were used to probe the penetration of the aqueous NaCl electrolyte into the pores in the prepared silver and silver oxide films, with surface wettability of all (Ag) and (Ag2O) thin films hydrophilic in nature, which is vital for a good electrochemical performance.The Faradaic redox reactions, capacitance and the charge discharge of the films when exposed to the NaCl electrolyte, were monitored with cyclic voltammetry and chronopotentiometry charge-discharge. Results show that Silver and silver oxide possess specific capacitance of 240.52 F/g and 275.50 F/g at 2 mV/s respectively, which is promising for electrochemical energy storage application.

    更新日期:2018-10-03
  • 更新日期:2018-09-29
  • Structural, optical, and bifunctional applications: Supercapacitor and photoelectrochemical water splitting of Ni-doped ZnO nanostructures
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-28
    I. Neelakanta Reddy, Ch. Venkata Reddy, Adem Sreedhar, Jaesool Shim, Migyung Cho, Kisoo Yoo, Dongseob Kim
    更新日期:2018-09-28
  • The aqueous deposition of a pH sensitive quinone on carbon paste electrodes using linear sweep voltammetry
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-26
    Karen M. Herdman, Carmel B. Breslin, Niall J. Finnerty
    更新日期:2018-09-27
  • A broad spectrum amperometric pesticide biosensor based on glutathione S-transferase immobilized on graphene oxide-gelatin matrix
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-27
    Himadri Borah, Sudarshan Gogoi, Shyamali Kalita, Panchanan Puzari
    更新日期:2018-09-27
  • A novel photoelectrochemical immunosensor for prion protein based on CdTe quantum dots and glucose oxidase
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-25
    Yanmei Li, Leixia Meng, Kang Zou, Xiaohua Zhang, Jinhua Chen
    更新日期:2018-09-25
  • Bulk and surface reconstructed Li-rich Mn-based cathode material for lithium ion batteries with eliminating irreversible capacity loss
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-22
    Lijiao Zhou, Zhoulan Yin, Zhiying Ding, Xinhai Li, Zhixing Wang, You Wang

    Bulk and surface reconstructed Li[Li0.2Mn0.54Ni0.13Co0.13]O2 cathode materials induced by spinel embedment and γ-MnO2 modification were synthesized by a one-step hydrothermal method. The results of XRD, XPS and SEM confirmed the introduction of γ-MnO2. The analysis of XPS, TEM images, dQ/dV curves and CV curves demonstrated that a spinel phase is embedded synchronously in the bulk of layered structure during the process of γ-MnO2 modification. The results of charge-discharge profiles and dQ/dV curves demonstrated the irreversible discharge capacity loss in the initial cycle is reduced with the introduction and collaboration of spinel and γ-MnO2. Namely, the initial coulombic efficiency is improved up to approximately 100%. Furthermore, the specific discharge capacity and rate performances are enhanced by a structure breakthrough for Li+ transport through blending with electrochemical active spinel-phase and γ-MnO2. In addition, the capacity retention of the material is enhanced from 64% up to 85% after 200 cycles. The main reasons are that the surface of Li[Li0.2Mn0.54Ni0.13Co0.13]O2 is stabilized and the phase transformation from surface to bulk is mitigated under the protection of γ-MnO2 coating layer.

    更新日期:2018-09-25
  • 更新日期:2018-09-25
  • Cellulase extraction from cellulolytic bacteria promoting bioelectricity production by degrading cellulose
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-21
    Nazish Manzoor, Yujing Jiang, Chenxi Li, Zhuangzhuang Liu, Lianbin Cao, Ying Liu

    In this study mix culture obtained from waste water was subjected to enzyme extraction which was readily used with carboxymethyl cellulose (CMC) in microbial fuel cell (MFCs) for electricity generation. The mix culture was further evaluated for dominant bacterial strain and individual enzyme activity. It was observed that the higher current density was recorded with dialyzed enzyme (360 μA cm−2) than control (without enzyme) 307 μA cm−2. Similarly power density of (MFCs) was also high in the dialyzed enzyme (866 ± 16.6 mW m−2) as compared to control (737 ± 2.0 mW m−2). Sequencing and relative abundance analysis of bacterial diversity in bacterial mix culture and the biofilm of dialyzed enzyme added system showed Proteobacteria, Bacteriodetes and Firmicutes as dominant phyla among the microbial communities. Citrobacter amalonaticus and Tolumonas osonensis OCF7 were isolated and evaluated for their enzyme activity which showed activity values of 0.67 IU mL−1 min−1 and 0.5 IU mL−1 min−1 respectively. These results demonstrated that microbial crude enzyme subjected for partial purification had synergistic effect on bacteria communities that hydrolyzed CMC as carbon source and thus improved the electricity generation performance of MFCs.

    更新日期:2018-09-22
  • Photocatalytic properties of intrinsically defective undoped bismuth vanadate (BiVO4) photocatalyst: A DFT study
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-21
    Mahesh Datt Bhatt, Jin Yong Lee

    Monoclinic clinobisvanite BiVO4 is one of the most promising photocatalyst due to its stability, low cost, narrow band gap, and suitable valence band maximum (VBM) position. The valence band maximum of about −7.10 eV at vacuum level was observed, which is well below the redox potential of water. However, the conduction band minimum, CBM of about −4.86 eV at vacuum level, which was responsible for its low efficiency. The presence of metal (Bi or V) vacancy changed the charge density and VBM of pristine BiVO4. Our calculated results revealed that 0.04% of the intrinsic Bi or V defects enhanced p-type conductivity and hence improved photocatalytic activity than O-interstitial in pristine BiVO4. The optical properties of both pristine and intrinsically defective BiVO4 were calculated and analyzed with perspective of their photocatalytic properties. Conclusively, the role of Bi or V (metal) vacancies in pristine BiVO4 was found to be significant than O interstitials in enhancing the photocatalytic properties regarding the solar water splitting.

    更新日期:2018-09-21
  • Highly viscous composite gel electrolyte based on cellulose acetate and nanoparticles
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-20
    Chuleekorn Chotsuwan, Suwimon Boonrungsiman, Udom Asawapirom, Kanpitcha Jiramitmongkon, Thanakorn Jiemsakul, Aroonsri Ngamaroonchote, Tirapote Rattanaamron

    This paper describes the effect of the addition of fumed silica nanoparticles in a composite gel electrolyte based on cellulose acetate and LiClO4. Changes in the viscosity, conductivity, morphology, diffusion and dynamic process of ion transport to a conductive polymer film on an ITO substrate were characterized to determine the nature of the nanoparticle interaction with the gel electrolyte. Fumed silica nanoparticles and cellulose acetate formed a linked network resulting in a highly viscous gel. The resulting composite gel electrolyte had a viscosity of 982.1 mPa·s and a conductivity of 4.39 ± 0.30 mS cm−1 at 25 °C, with potential applications including in electrochemical devices.

    更新日期:2018-09-21
  • Charge-transfer characteristics in carbon nanostructure/metal oxide photoelectrodes efficiently probed by hydrogen peroxide
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-20
    Javier Hernández-Ferrer, Alejandro Ansón-Casaos, Sandra Víctor-Román, Ana Santidrián, Ana M. Benito, Wolfgang K. Maser

    The charge-transfer characteristics of nanostructured carbon/TiO2 electrodes are studied by cyclic voltammetry under photoelectrochemical conditions exploiting the electrooxidation and electroreduction of H2O2 in an alkaline medium. Films of composites were prepared by physically mixing TiO2 with 5 wt% of either single-walled carbon nanotubes (SWCNTs) or reduced graphene oxide (rGO). In addition, a layer-by-layer rGO/TiO2 electrode was prepared. Under dark conditions, both mixed SWCNTs and rGO facilitate H2O2 reduction. Under light irradiation, the blank TiO2 electrode shows a cathodic photopotential, the SWCNT/TiO2 an anodic photopotential, and the mixed rGO/TiO2 an increased cathodic photopotential. This scenario unambiguously reveals a photoelectron acceptor behavior for SWCNTs and a photohole acceptor performance for rGO. The latter one also agrees with the photoactivity observed in the layer-by-layer electrode. Overall, the value of H2O2 redox reactions for unraveling the electron-donor or electron-acceptor character of carbon nanostructures in C/metal oxide electrodes is demonstrated.

    更新日期:2018-09-20
  • 更新日期:2018-09-20
  • Electrospun MoS2 composite carbon nanofibers for determination of vanillin
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-19
    Mei Qianwen, Ding Yaping, Li Li, Wang Anqing, Duan Dingding, Zhao Yijun

    Electrospun molybdenum disulfide (MoS2) nanoparticles composite carbon nanofibers (MoS2-CNF) were first applied for determining the amount of Vanillin. The synthesized MoS2-CNF was characterized by scanning electron microscopy (SEM), Raman, X-Ray diffraction (XRD) and Electrochemical impedance technique (EIS). The electrochemical detection of vanillin was successfully conducted in 0.1 M Phosphate Buffer (pH 10) and showed a good linear response in the range of 0.3 to 135 μM and the detection limit reached 0.15 μM. The sensor showed a good amperometric response signal toward vanillin and result in the determination of real sample.

    更新日期:2018-09-20
  • Oxygen reduction reaction on nickel-based Prussian blue analog frameworks synthesized via electrochemical anodization route
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-18
    Hoa Thi Bui, Nabeen K. Shrestha, Keumnam Cho, Chinna Bathula, Henry Opoku, Yong-Young Noh, Sung-Hwan Han
    更新日期:2018-09-19
  • 更新日期:2018-09-18
  • Interconnected nanoparticle-stacked platinum-based nanosheets as active cathode electrocatalysts for passive direct methanol fuel cells
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-17
    Guoliang Wang, Jingjing Jiang, Qinghong Huang, Yi Zhou, Zhiqing Zou, Hui Yang

    Interconnected nanoparticle-stacked two-dimensional Pt and porous PtNi alloy nanosheets are synthesized via galvanic replacement of Ni nanobelts. The Pt and porous PtNi nanosheets achieve a factor of approximately 1.3 and 2.3 enhancement in mass activity at 0.9 V versus RHE for oxygen reduction reaction relative to commercial Pt black, respectively. The practicability of Pt and porous PtNi nanosheets used as cathodic electrocatalysts for passive direct methanol fuel cells (DMFCs) is investigated. The passive DMFCs with Pt nanosheets (1.0 mg(Pt) cm−2) and porous PtNi nanosheets (0.8 mg(Pt) cm−2) exhibit excellent performance with satisfactory stability at 25 °C, which is slightly higher than that of the conventional cell with 2.0 mg(Pt) cm−2. The performance improvement of cells with Pt and porous PtNi nanosheets is attributed to the enhanced electrocatalytic activity and decreased charge transfer resistance of the cathodic catalyst layer. Benefiting from the porous structure of the PtNi nanosheets, the cell's performance is further boosted due to an increased Pt utilization. This work may provide an applicable approach to develop two-dimensional electrocatalysts for passive DMFCs, revealing a new strategy to decrease the usage of platinum.

    更新日期:2018-09-18
  • A surface-confined DNA assembly enabled target recycling amplification for multiplexed electrochemical DNA detection
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-18
    Hong Zhang, Zhaopeng Song, Feilong Pan, Fan He

    A novel and enzyme-free electrochemical sensor was designed for multiplexed DNA detection based on a surface-confined DNA assembly enabled target recycling amplification. In this designed system, two hairpin DNA probes (hairpin 1 and hairpin 2) were immobilized on the surface of gold nanoparticles/graphene/nafion modified glassy carbon electrode (AuNPs/Gr/Nf/GCE). In the presence of two DNA targets, the hairpin structures of hairpin 1 and hairpin 2 opened through the complementary hybridization, resulting in the formation of hairpin 1: target DNA 1 and hairpin 2: target DNA 2. When they met methylene blue (MB)-labeled hairpin 3 (hairpin 3-MB) and ferrocene (Fc)-labeled hairpin 4 (hairpin 4-Fc), DNA cyclic amplification was activated, and the DNA targets were released and could be reused for the next recycling. Meanwhile, coupled with the utilization of positively charged gold nanoparticles ((+)AuNPs), multiplexed DNA detection was realized in the concentration range from 10 fM to 1.5 pM with the detection limits of 3.6 fM and 2.5 fM for target DNA 1 and target DNA 2, respectively. Moreover, satisfactory results were obtained when detecting DNA targets in human serum samples, suggesting that this proposed sensing platform is promising for the applications in complex biological samples.

    更新日期:2018-09-18
  • Cytochrome c electrochemistry on peptide self-assembled monolayers
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-18
    Tanner M. Yawitz, Kelsey S. Patterson, Bryant X. Onkst, Frank Youmbi, Rose A. Clark

    A short chain peptide is covalently attached to an evaporated gold electrode to form a biocompatible self-assembled monolayer (SAM) surface. The peptide is designed to optimize the interfacial interaction of horse heart cytochrome c (cytc) through the electrostatic interaction of the carboxylate group on the terminal amino acid glutamate and the amine on lysine in cytc. Cytc exhibits quasi-reversible voltammetry and is stable on the time scale of the experiments. Marcus theory is used to calculate the electron transfer rates, which are ~5 times faster for cytc/peptide/Au compared to cytc/11-mercaptoundecanoic acid/Au SAMs of similar chain length. The formal potentials also shift for the cytc/peptide system ~20 mV more positive than cytc adsorbed to 11-mercaptoundecanoic acid-SAM/Au electrodes.

    更新日期:2018-09-18
  • Influence of Zr dopant on microstructural and electrochemical properties of LiCoO2 thin film cathodes by RF sputtering
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-17
    K. Sivajee Ganesh, B. Purusottam reddy, P. Jeevan Kumar, O.M. Hussain

    LiCoO2 thin film cathodes have been well established in Li-ion rechargeable batteries, however, its useful capacity hardly exceeds 50% of the theoretical value. Irreversible structural changes will occur upon exchange of Li ions i.e. >0.5 per unit formula limit, during intercalation/deintercalation reactions. Reportedly, lattice doping phenomenon has noticed an improvement in cyclability of LiCoO2. In this work, the influence of Zr doping on microstructural and electrochemical properties of RF magnetron sputtered LiCoO2 thin film cathodes have been presented. A series of LiZrxCo1−xO2 thin films have been deposited on Au/Ti/SiO2/Si (100) substrates using a Zr–LiCoO2 mosaic target. All the films were deposited at optimized processing conditions. XRD and Raman spectroscopy measurements confirmed the hexagonal layered structure with R3¯m symmetry for Zr doped LiCoO2 film cathodes. The AFM reveals the estimated average grain size is around 50 nm. The cyclic voltammetry studies for these cathodes exhibit narrow potential peak separation of 24 mV and resulting highest diffusion coefficient (D¯Li) of about 1.8 × 10−11 cm2 s−1, respectively. These films exhibited a highest initial discharge capacity of 64.4 μA h cm−2 μm−1 with a capacity retention of 98.5% even after 25 cycles. In non-aqueous region, the cell exhibited an initial discharge capacity of about 65 μA h cm−2 μm−1 with good cycling stability even after 80 cycles, and is observed to be the more promising cathode candidate than the pristine LiCoO2 films.

    更新日期:2018-09-17
  • 更新日期:2018-09-15
  • 更新日期:2018-09-15
  • Flexible asymmetric supercapacitors based on CuO@MnO2-rGO and MoS2-rGO with ultrahigh energy density
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-14
    Akbar Mohammadi Zardkhoshoui, Saied Saeed Hosseiny Davarani

    Herein, we have constructed a flexible asymmetric supercapacitor (FASC) with outstanding energy density (ED) using MoS2-rGO and CuO@MnO2-rGO hybrid electrodes as the negative and positive electrodes respectively. The CuO@MnO2-rGO electrode represents significant electrochemical properties, such as significant specific capacitance (Csc) of 421.30 F g−1, superior rate capability, and outstanding durability. Furthermore, the MoS2-rGO electrode displays superior electrochemical behavior containing a good specific capacitance (Csc) of 329 F g−1 with a satisfactory rate capability of 56% and significant durability. Due to the excellent specific capacitance (Csc) and remarkable rate performance of CuO@MnO2-rGO and MoS2-rGO electrodes, the FASC illustrates outstanding electrochemical performance consisting of supreme cycle life (only 8.1% loss after 10,000 cycles), an outstanding energy density (ED) of 165.66 Wh kg−1 and a power density (PD) of 1992 W kg−1.

    更新日期:2018-09-14
  • 更新日期:2018-09-14
  • Carbon fibers surface-grown with helical carbon nanotubes and polyaniline for high-performance electrode materials and flexible supercapacitors
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-13
    Hongchun Luo, Hengqing Lu, Jun Qiu

    Carbon fiber-based flexible supercapacitors have attracted wide attention due to their excellent properties. In this paper, a novel high performance flexible supercapacitor is reported. The carbon fibers surface-grown with helical carbon nanotubes (CF-HCNTs) are prepared using chemical vapor deposition and then combined with PANI by in-situ polymerization to form a 3D porous structure. The carbon fibers surface-grown with helical carbon nanotubes and polyaniline (CF-HCNTs-PANI) flexible supercapacitor electrodes exhibit a high capacitance of 660 F/g at a current density of 1 A/g with good cycling stability (90.4% capacitance retention after 1000 charge/discharge cycles) and low interfacial charge-transfer resistance of 0.5 Ω. These excellent electrochemical performances are attributed to faradic pseudocapacity, large surface area, 3D porous structure of the CF-HCNTs-PANI electrodes and unique multi-scale fibrous materials. Furthermore, the all-solid-state CF-HCNTs-PANI flexible supercapacitor shows a good specific capacitance of 439 F/g at a current density of 0.05 A/g and has excellent deformation stability. Its electrochemical performance does not cause obvious effect after bending and twisting (95.4% capacitance retention after 500 bending/recovery cycles and near no change after twisting). The CF-HCNTs-PANI electrode with the unique nanostructure will play an important role in the preparation of flexible supercapacitors.

    更新日期:2018-09-14
  • Expanded graphite supported p-n MoS2-SnO2 heterojunction nanocomposite electrode for enhanced photo-electrocatalytic degradation of a pharmaceutical pollutant
    J. Electroanal. Chem. (IF 3.235) Pub Date : 2018-09-13
    Eseoghene H. Umukoro, Neeraj Kumar, Jane C. Ngila, Omotayo A. Arotiba

    Wastewater treatment challenges by conventional methods have necessitated the need for alternative/complementary methods that are environmentally benign and efficient especially toward recalcitrant organic pollutants. In this regard, a novel photoanode consisting of a p-n MoS2-SnO2 heterojunction anchored on expanded graphite (EG) was fabricated and employed in the photo-electrocatalytic degradation of ciprofloxacin, a pharmaceutical pollutant, in water using a current density of 0.010 A cm−2. The photoanode material was characterised with transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), Raman spectroscopy and X-ray diffraction (XRD) to confirm that the nanocomposite was successfully prepared. Photoelectrochemical studies were carried out with cyclic/linear sweep voltammetry and chronoamperometry. The removal efficiency of the photo-electrocatalytic cell was determined on a UV–Visible spectrophotometer and the extent of mineralisation was measured by a total organic carbon analyser. The results obtained revealed that the SnO2 particles are nanosheets while the MoS2 particles are hierarchical microspheres having nanosheets of MoS2, and they were anchored on the interlayers of the EG sheets. Also, the p-n MoS2-SnO2 heterojunction anchored on expanded graphite (EG) was found to be photoactive and displayed a better removal efficiency and mineralisation in comparison to EG, SnO2-EG and MoS2-EG electrodes. This may be due to the formation of the MoS2-SnO2 p-n heterojunction in the MoS2-SnO2/EG nanocomposite which enhanced the light harvesting ability of the material resulting in its improved photo-electrocatalytic performance. Hence the MoS2-SnO2/EG is potentially a good photoelectrode which may be beneficial for a photo-electrocatalytic treatment of industrial wastewaters and other photo-electrocatalytic applications.

    更新日期:2018-09-13
Some contents have been Reproduced with permission of the American Chemical Society.
Some contents have been Reproduced by permission of The Royal Society of Chemistry.
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