The generation of efficient, cheap and easily available water splitting catalysts, in particular for the oxygen evolution reaction (OER), is vital to the development of sustainable energy sources. Primary batteries, especially alkaline and Zn‐C batteries, mostly end‐up in landfill due to their short lifespan and aggravates health and poses environmental threats. To address these issues, this work establishes

The commercialization of sulfur batteries is hindered by a few inherent drawbacks. In this study, crumpled N‐doped graphene anchored with cobalt (Co‐NCG) was fabricated in one pot via a sample solvothermal method and applied to lithium–sulfur (Li‐S) batteries. The crumpled structure not only gives graphene a large specific surface area and abundant pores, but also endows graphene superb stability by

A signal‐off aptasensor was described based on well‐designed aptamer‐ Cu 3 (PO 4 ) 2 hybrid nanoflowers&graphene oxide composites ( aptamer‐Cu 3 (PO 4 ) 2 HNF&GO ) as an effective sensing platform and molybdophosphate precipitation as the signaling element. The aptamer, as the bi orecognition unit grafted on aptamer‐Cu 3 (PO 4 ) 2 HNF&GO by the specificity of streptavidin and biotin, captured the carcinoembryonic

A 3D conductive network nanostructured composite of ZnS nanospheres anchored on multiwall carbon nanotubes (denoted as ZnS/MWCNTs) is synthesized via one‐pot hydrothermal method as anodes for sodium‐ion batteries. The MWCNTs backbone can form an interconnected network and nano‐sized ZnS spheres are uniformly and closely anchored on the 3D network of MWCNTs. The morphology and microstructures of the

Ilmenite, general formula FeTiO 3 , has been proposed as possible conversion anode material for lithium and sodium ion batteries, with theoretical capacity of 530 mAhg ‐1 . Experimentally, the observed specific capacity for pristine ilmenite is far away from the theoretical value; for this reason, the control of morphology via alkaline hydrothermal treatment has been proposed as possible strategy to

CO 2 reduction reactions (CO 2 RR) are interesting for power‐to‐x applications and have been studied on Pt electrodes in 1‐ethyl‐3‐methylimidazolium dicyanamide [EMIM][DCA] as well as in 1‐ethyl‐3‐methylimidazolium [EMIM][BF 4 ], 1‐butyl‐3‐methylimidazolium [BMIM][BF 4 ] and 1‐ocytl‐3‐methylimidazolium tetrafluoroborate [OMIM][BF 4 ] electrolytes. Cyclic voltammetry indicates a strong increase of activity

Redox‐active organics based on a multi‐electron mechanism are of great interest in battery electrode materials as they are capable of delivering high capacity per molecular weight. However, most of such organics shows huge voltage gap that is inherited from their stepwise redox reactions occurring in the same conjugated redox moiety. This study focuses on the voltage tailoring of polymeric dihydrophenazine

Dye‐sensitized solar cells containing sugar‐based Natural Deep Eutectic Solvents (NADESs) as active electrolyte solvents have been studied in their photovoltaic (PV) properties, including main PV characteristics, IPCE, and EIS. Five monosaccharides were selected as NADES H‐bond donors and investigated with a phenothiazine‐based sensitizer carrying a glucose functionality and a glucose‐based co‐adsorbent

The conversion of biomass into valuable carbon composites as an efficient non‐precious energy storage electrode material has elicited extensive research interests. As synthesized partially graphitized iron oxide‐carbon composite material (Fe3O 4 /Fe3C@C) shows an excellent property as an electrode material for supercapacitor. X‐ray diffraction analysis, high resolution transmission electron microscopy

Carbon materials have widely been used to enhance the performance of a plethora of supercapacitor electrode materials. In this regard, it is crucial to identify carbon materials that function over a wide pH range while enjoying a wide potential window. Herein, the DFT calculations were used to elucidate the electronic performance of C76 and the C76/electrolyte interface. The electronic investigation

The hydrophobicity of the cathode catalyst layer (CCL) affects the performance of the proton exchange membrane fuel cell (PEMFC) by adjusting the water management of the catalyst layer, which has been extensively studied in Pt‐based catalysts. Here, the effect of the hydrophobicity of Fe‐N‐C CCL on the performance of PEMFC is investigated. The hydrophobicity of Fe‐N‐C CCL is tuned by polytetrafluoroethylene

Herein, a simple synthesis method was used to prepare an active oxygen reduction reaction (ORR) electrocatalyst based on iron and nitrogen co‐doped graphene for polymer electrolyte fuel cell applications. For the synthesis of the ORR catalysts, two different graphene‐based materials, commercially available graphene (Gra) and graphene oxide (GO), were used as carbon source. The half‐cell experiments

Two‐dimensional (2D) reduced graphene oxide (rGO) is often combined with metal oxides for energy‐storage applications, owing to its unique properties. Here, we compare the electrochemical performance of Nb 2 O 5 ‐rGO and amorphous carbon‐coated‐Nb 2 O 5 composites, synthesized in similar conditions.The composite made of Nb 2 O 5 and amorphous carbon (using 1,3,5‐triphenylbenzene as carbon source) outperforms

Herein, we describe an experimental approach for adapting the principles of Raman spectroelectrochemistry to electrodes controlled using a bipolar circuit. This method allows the simultaneous acquisition of spectroscopic data as a function of both the electrode potential and the chemical composition of a bimetallic alloy and can be generalized to other system variables. The electrochemical reduction

Lithium (Li) metal anodes are demanded by high‐energy Li batteries because Li has the highest capacity and low electrode potential. However, Li metal anodes usually show poor cyclability and unsafe deposition at anode/separator interfaces, which may increase the risk of short circuits. In this work, we fabricate a sandwiched structure of reduced graphene oxides (rGO) with silicon (Si) quantum dots

An excellent catalyst can be effectively designed by adjusting its electronic structure. In this paper, an efficient hydrogen evolution reaction (HER) catalyst, carbon nanotubes with N doping and sublayer Co 4 N encapsulating (N‐CNTs@Co 4 N) supported on Ni foam (NF), was designed and prepared through a complementary electronic structur e principle. The as‐prepared N‐CNTs@Co 4 N@NF catalyst shows outstanding

Enzymatic biosensors are commonly used to evaluate the concentration of individual analytes in samples (e.g., glucose in blood, lactate in sweat, etc.), where the working electrode utilizes an enzyme (a “bioelectrode”) as the chemically selective agent for electrochemical analyses. However, those same enzymatic bioelectrodes can be used for the analytical characterization of enzymes as a new biophysical

The electrochemical reduction of two chloro‐substituted 4‐(thiazol‐2‐ylazo)naphthalenes has been studied by means of spectroelectrochemistry and simulated with the DFT method. Whereas the 1‐chloro‐4‐(4‐chlorothiazol‐2‐ylazo)naphthalene forms both a stable radical anion and a dianion, the dianion of 1‐chloro‐4‐(thiazol‐2‐ylazo)naphthalene is instable. In the radical anion of both compounds, the spin

In the quest for ever higher energy and power densities of lithium‐based batteries, numerous functional materials are being utilized, however in many cases their highly reactive nature is likely to increase the risk of danger in case of battery failures. This especially affects the aprotic non‐aqueous organic carbonate‐based electrolyte, still considered as the state‐of‐the‐art (SOTA) and its volatile

The electrochemistry of β‐substituted tetraphenylporphyrins with a single ethyl acetoacetate (EAA), acetylacetone (acac) or ethyl acetate (EA) group and two antipodal H, Br or Ph groups was investigated in CH2Cl2 containing 0.1 M tetrabutylammonium perchlorate (TBAP) before and after addition of base to solution in the form of tetrabutylamonium hydroxide (TBAOH). The tri‐substituted porphyrins in their

Sodium‐ion technology is a reliable alternative to lithium‐ion for large‐scale energy storage because of the abundance of sodium sources and low cost. In this work we report about a simple fabrication of self‐standing electrodes based on electrospun carbon nanofiber (CNF) loaded with Na 3 V 2 (PO 4 ) 3 with NASICON framework, which is a promising cathode material that has shown good electrochemical

The use of a supporting electrolyte has been a significant issue in electro‐organic chemistry because it can be wasteful and increase steps in terms of separation from target products. However, it is ideal for an electrolyte to play multiple roles in reactions, for example as a feedstock or catalyst. We have discovered that the combination of N,N ‐diisopropylethylamine (DIPEA) and 1,1,1,3,3‐hexafluoropropan‐2‐ol

Sodium‐ion batteries (SIBs) using transition metal oxides as cathodes have been considered as prospective alternatives for energy storage applications. Herein, the 4d‐cation Zr‐substitution strategy is proposed to optimize the structure and electrochemical properties of Na0.44MnO2 for the first time. In‐situ X‐ray diffraction demonstrates that the optimized Na0.44Mn0.98Zr0.02O2 exhibits a smaller volume

Amidst the escalating urge in the economical generation of clean hydrogen fuel from water, this article presents the development of simple and economical electrocatalysts, Cobalt Molybdenum Sulfides (Co‐Mo‐S), for oxygen evolution (OER) and hydrogen evolution (HER) reactions. The compositional modulation of Co and Mo produces the highly active catalysts, Co0.75Mo0.25Sx for OER and Co0.40Mo0.60Sx for

This current review addresses the use of screen‐printed electrodes (SPEs) coupled to flow systems such as flow injection analysis (FIA), batch injection analysis (BIA), and high‐performance liquid chromatography (HPLC) over the last six years (2014‐2019). The combination of SPEs and flow systems is a powerful synergy to increase the throughput of measurements, improve electrode lifetime, and reduce

Ionic liquids (ILs) have gained attention as promising solvents as reaction media for the electrochemical conversion of CO2 into valued‐added products. ILs can co‐catalyze the CO2 reduction reaction (CO2RR), in particular, when Ag is applied as the primary metallic electrocatalyst. To broaden this co‐catalysis concept, we conducted a comprehensive study of a range of electrode materials exposed to

In this research, the effect of alkali metal cations including Li, Na and Cs in hydrothermal solution is investigated on the morphology, stability, and photoactivity of nanostructured TiO 2 nanoflakes as a photoanode. The TiO 2 nanoflakes are formed through hydrothermal treatment of Ti foil in 1.0 M LiOH, NaOH or CsOH at 100 °C for 3h. By subsequent thermal reduction of the structure in an optimized

The present work reports the application of synthesized three‐dimensional Ti/Pt−Pd nanoparticles with highly rough surfaces supported on graphene nanoribbons (Ti/Pt−Pd/GNR nanocomposite) by a single one‐pot reaction, and applied in ORR. Unlike the effect of strong metal‐support interaction (SMSI), which favors electrons transfer from the metal support to the catalyst, the mechanism employed in this

Nickel‐rich layered oxides with high reversible capacity are considered as the next‐generation cathode materials for lithium‐ion batteries (LIBs). However, capacity degradation induced by side reactions and structural degradation on the surface has been the main obstacle for their applications. In this work, a stable layer of La 4 NiLiO 8 is coated on Ni‐rich material of Li[Ni 0.88 Co 0.09 Al 0.03

Enzymatic electrochemistry is the coupling of oxidoreductase enzymes to electrodes, where electrons are transferred between the electrode and an enzyme’s cofactor(s). In addition to enzymatic electrochemistry enabling mechanistic study (such as the determination of cofactor reduction potential(s)), enzymatic electrocatalysis also enables substrate reduction or oxidation by exploiting the catalytic

The development of stable, cost‐efficient and active materials is one of the main challenges in catalysis. The utilization of platinum in the electro‐reduction of oxygen is a salient example where the development of new material combinations has led to a drastic increase in specific activity compared to bare platinum. These material classes comprise nanostructured thin films, platinum‐alloys, shape‐controlled

Carbon dioxide reduction reaction (CO2RR) driven by renewable electricity is a promising way to tackle the CO2 emission woes and recycle use of CO2 . The synthesis of electrocatalyst with high activity and selectivity towards CO2RR to ethylene remains a great challenge. Herein, the leaf‐like CuO nanosheets are in‐situ fabricated on nitrogen doped graphene (NG) by a novel reduction‐oxidation‐reconstruction

A pomegranate‐like cathode, VN/S@G, is synthesized according to a simple principle of electrostatic attraction through a controllable Zeta potential method, establishing a hierarchical‐structured VN/S nanoclusters capsuled with graphene nanosheets. Interior VN nanoparticles trap lithium polysulphides (LiPSs) and catalyse them transform from long‐chain to short‐chain species; exterior cladding layers

Two lithium‐ion hybrid supercapacitors (LiHSs) based on high power active materials like Li3V1.95Ni0.05(PO4)3/C (LVNP/C), Li4Ti5O12 (LTO) and activated carbon (AC) are investigated as high energy and high power devices. Both LiHSs are assembled by using a bi‐material negative LTO:AC electrode (50:50), able to deliver 38.3 mAh g‐1 at 35 A g‐1 (200C for the LTO), and to retain 80% of the initial capacity

Intensive researches for the design of catalysts involved in energy conversion and fuel cell technologies have allowed great progress in field. However, durable, efficient and selective electrocatalytic systems for the activation of fuel molecules at the lowest cost are still needed. The most developed strategies consist in the tailoring of shape, size and composition of metallic nanomaterials. Yet

Graphite is the major anode material of commercial lithium‐ion batteries (LIBs), and thus improving its cycling stability is an effective approach to extend battery life. In this study, succinic anhydride group, methoxyethanol and methoxypolyethylene glycol segments are chemically bonded to the surfaces of graphite particles by the Diels‐Alder and the subsequent esterification reactions. The synthesized

Bipyridine complexes of Ni are used as catalysts in a variety of reductive transformations. Here, the electroreduction of [Ni(Mebpy) 3 ] 2+ (Mebpy = 4,4’‐dimethyl‐2,2’‐bipyridine) in dimethylformamide is reported, with the aim of determining the redox mechanism and oxidation states of products formed under well‐controlled electrochemical conditions. Results from cyclic voltammetry, steady‐state voltammetry

Nickel is a promising electrocatalyst of hydrogen electrode reaction in alkaline media. Its electrocatalytic activity for hydrogen oxidation and evolution reactions can be enhanced when its surface is partially covered by Ni (hydr)oxides or by associating Ni with Cu. In this work, the influence of the NaOH concentration on the hydrogen electrode kinetics on various Ni electrodes is investigated. On

Dendrite suppression capability is key to the practical deployment of rechargeable Zn‐based batteries. We propose a systematic electrochemical investigation, accompanied by SEM imaging, of the impact of representative quaternary ammonium (QA) salts and ionomers on Zn electrodeposition. Both cathodic and anodic processes were considered, because insoluble corrosion products can impact subsequent electrodeposition

The selectivity problem of the competing chlorine (CER) and oxygen evolution reactions (OER) at the anode in chlor‐alkali electrolysis is a major challenge in chemical industry. The development of electrode materials with enhanced stability and CER selectivity could result in a significant reduction of the overall process costs. In order to gain an atomic‐scale understanding of the CER vs. OER selectivity

We report the synthesis and application of a material composed of Fe 3 O 4 nanoparticles embedded in N‐doped graphene sheets (Fe 3 O 4 @N‐doped graphene) as a negative electrode for Li batteries. We study the influence of N‐doped graphene on the storage capacity of Fe 3 O 4 using different electrochemical techniques. The as‐prepared Fe 3 O 4 materials presented high‐quality crystalline nanostructures