In this study, a non‐modified closed bipolar electrochemical system for ultrasensitive cancer cell detection by quantitative measurement of released hydrogen peroxide in the presence of ascorbic acid has been developed. This system includes two separated chambers (reporting and sensing), a piece of a gold archival CD as a bipolar electrode and two platinum driving electrodes. By following ECL intensities

Commercially available monoclinic tungsten oxide WO3 (Pearson symbol mP32) is investigated electrochemically for its selectivity and sensitivity towards potassium ion detection. Electro‐reduction in aqueous potassium chloride solution shows two distinct phases, identified as tungsten bronzes KxWO3 (phase 1: maximum x1 ≈ 0.1 and phase 2: maximum x2 ≈ 0.3). In‐situ synchrotron powder X‐ray diffraction

Platinum group metal‐free (PGM‐free) catalysts are the most promising materials for substituting expensive platinum catalyst for efficient oxygen reduction reaction (ORR), particularly for microbial fuel cells. For these devices contamination due to wastewater is one of the major issues due to the presence of various poisoning anions. The known nitrite contamination effect over PGM‐free was studied

Through a stepwise synthesis, intercalation followed by CVD method, WP nanorods has been grown on surface of WS2/C composite. Compared to WS2/C, WP nanorods@WS2/C demonstrates better HER activities, and long‐term chronopotentiometric stabilities, as well as suitability in both acid electrolyte and alkaline electrolyte. In order to uncover the enhanced HER property reason, systematic characterization

Developing low‐cost and fast methods for on‐site analysis is a long‐sought goal of the wine industry, especially to detect excessive concentrations of naturally occurring compounds such as polyphenols and pesticide residues. In this paper, we report on the treatment of screen‐printed electrodes, which were capable of detecting the flavonoid quercetin and the pesticide carbendazim simultaneously in

The authors have recently identified an error in Figure 6 and Figure S2. The corrected figures can be found below. The authors confirm that these changes do not affect the results or conclusions. The author apologizes for this oversight and for any inconvenience caused. Figure 6 . Limiting mass transfer coefficient as a function of the velocity. Figure S2 . Limiting mass transfer coefficient as a function

Silicon with the advantages of ultra‐high theoretical specific capacity (4200 mAh g‐1) and low potential is regarded as a promising anode material. However, its commercial application is still impeded by the poor rate capability and bad cycling durability caused by its low electrical/ionic conductivities and exaggerated volume change. Herein, an eco‐friendly pinecone‐derived porous carbon (PPC) is

Fe‐NC has been one of the most ideal candidates to replace Pt‐based oxygen reduction reaction (ORR) electrocatalysts due to its low cost and comparable high intrinsic activity. To further enhance the ORR performance of Fe‐NC electrocatalysts, two main method has been focused. One is to enhance the intrinsic activity of FeN x sites through electronic and geometrical regulation, and the other is to increase

In this work we report a simple and cost‐effective CsPbBr 3 ‐based solar cell without ordinary selective contacts. To do so we follow an electrochemical approach consisting of three successive steps: (1) electrodeposition of PbO 2 directly on top of FTO substrates, (2) heterogeneous phase reaction with gaseous HBr and (3) spin‐coating of methanolic CsBr solutions followed by annealing. This method

Manganese‐based aqueous batteries have attracted significant attention due to their earth‐abundant components and low environmental burden. However, state‐of‐the‐art manganese‐zinc batteries are poorly rechargeable due to dendrite formation on the zinc anode . Organic materials could provide a safe and sustainable replacement. In the present work, a conducting redox polymer (CRP) based on a trimer

We demonstrate the synthesis of two bifunctional electrocatalysts (Co‐N‐C‐TET and Co‐N‐C‐Phen) based on cobalt and nitrogen doped mesoporous carbon derived from cobalt complexes and their bifunctional electrocatalytic activity towards oxygen electrocatalysis. Both catalysts are bifunctionally active towards oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in alkaline pH. The Co‐N‐C‐TET

Considerable attention on sustainable clean energy resources has led to the development of a plethora of catalytic materials, specifically geared toward water electrolysis. Among various developed catalysts, noble metal‐based electrocatalysts have shown promising performances for oxygen and hydrogen evolution reactions (OER and HER). However, their high price and scarcity always have been a roadblock

The structural properties of CoFe composites fabricated from inexpensive Co(II) and Fe(III) precursors using a Prussian blue analogue (PBA) strategy without additional reductants were investigated. Microporous CoFe‐200 and microporous/mesoporous CoFe‐550 structures of the CoFe catalysts (CoFe‐PBA) were produced by calcination in N 2 at 200 ℃ or 550 ℃ for 1 h, respectively. The electrocatalytic activities

In lithium battery, high nickel content layered oxide cathode materials (as LiNi 0.8 Mn 0.1 Co 0.1 O 2 ) are gaining much attention due to their high capacity and energy density. Therefore in present study, NMC811 cathode material is synthesized successfully. But these Ni rich cathode materials can not be operated at higher voltage with liquid electrolytes as they arise some problems such as structural

Most of the anodes used in lithium‐/sodium‐ion batteries (LIBs/SIBs) have poor low‐temperature (LT) performances, which severely limit their applications under LT environment. Herein, two‐dimensional nickel oxide nanosheet encapsulated in N‐doped carbon coated layer (abbreviated as NiO@C‐N NSs) is successfully prepared and investigated for the first time as a LT anode for LIBs/SIBs. As a result, the

The greenhouse effect and climate change caused by carbon dioxide (CO2) have become global challenges. Electrochemical reduction is one of the most promising paths to convert CO2 into a feedstock such as formate for the synthesis of value‐added chemicals and fuels. We first performed theoretical calculations to predict activity of bismuth oxide (Bi2O3) to CO2 electroreduction. The analysis of the reaction

The MoS 2 incorporated into the 3D hierarchically N,S co‐doped carbon composites (MoS 2 @NSC) were prepared via a facile and scalable method by using the functional fluidic acrylonitrile telomer as carbon source and doping agent, and SiO 2 as hard templates. The optimal MoS 2 @NSC‐2 showed effective ORR catalytic activity with the initial potential of 0.93V and half‐potential of 0.82V in basic electrolyte

In this work, it has been evaluated how the performance of an electrolyzer, used to treat a clopyralid waste and powered directly without regulation with a battery, is influenced by the electrodes resistance . Electrolyzers were equipped with electrodes consisting of the same boron‐doped diamond (BDD) coating deposited on different substrate (Si, Ta and Nb). The results expose great differences despite

A series of planar‐stereogenicity ferrocenes, important as chiral promoters in enantioselective catalysis, is here characterized in terms of relationships between structure and electronic properties. The enantiomers of six selected model cases are then successfully discriminated in voltammetry experiments on electrodes modified with electrodeposited inhe­rently chiral oligomer films, in terms of significant

We report a novel negative conversion electrode material, manganese (II) metaphosphate Mn(PO3)2. This compound can be synthesized by a facile solid‐state method, and after carbon‐coating delivers an attractively high reversible capacity of 477 mAh/g at 0.1C and 385 mAh/g at 1C. We investigated the reaction mechanism with a combination of ex situ X‐ray absorption spectroscopy, in situ X‐ray diffraction

Searching for new materials and battery architecture is highly essential for developing scalable energy storage system with good reliability, low cost, long cycle life, and high power density. Here, we report the fabrication of a simple and cheap aqueous battery with potential for low‐cost energy storage. In this battery, a quinoid modified activated carbon electrode is adopted as the anode while a

An electropolymerized ion selective PEDOT analog is presented in this communication. Poly‐(2‐phenyl‐15crown‐5‐(3,4‐ethylene‐dioxythiophene)‐amine) (PEDOT‐Crown15) showed excellent electrochemical stability with a fast electron transfer (ΔEp = 50 mV). In comparison with unmodified PEDOT, a faster change from isolating to conducting state was observed. This is attributed to the formation of a well‐ordered

Herein, a new‐fashioned of composite anode Cu foil current collector (PANI/Cu) with polyaniline (PANI) surface‐modified was prepared. SEM manifests that the PANI layer is 1.8 μm thick and composed of a diameter of 50 nm nanometre PANI particles, which provides a large contact surface to electrode material to enhance the strength of adhering to the electrode material. FT‐IR and UV–vis analysis confirmed

Rational construction of electrode materials with exclusive structural and composition are highly attractive to improve the electrochemical properties of supercapacitors (SCs). In the present study, we demonstrate the construction of unique core‐shell Ni‐Mn‐Co‐S@Co(OH)2 nanoarrays on nickel foam (denoted as NMCS@COH/NF) as an attractive battery‐type electrode material for SCs through the hydrothermal