Efficient MoS2/V2O5 Electrocatalyst for Enhanced Oxygen and Hydrogen Evolution Reactions

IF 2.7 4区化学 Q3 CHEMISTRY, PHYSICAL Electrocatalysis Pub Date : 2023-04-29 DOI:10.1007/s12678-023-00822-1

Krishna Kanta Haldar, Imtiaz Ahmed, Rathindranath Biswas, Shouvik Mete, Ranjit A. Patil, Yuan-Ron Ma

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Abstract

Electrochemical (EC) water splitting is a promising approach for the generation of renewable hydrogen (H₂) fuels and oxygen (O₂) evolution. Composite structured molybdenum disulphide (MoS₂)/vanadium pentoxide (V₂O₅) with low overpotential is a promising electrocatalyst for anodic and cathodic material for an alternative energy source. We fabricated a flower shape MoS₂/V₂O₅ composite via a hydrothermal approach where V₂O₅grew on the surface of the MoS₂ petals. The unique flower-type composite structure alleviates the surface expansion of electrode material. The electrochemical studies show that the composite possesses good stability with low overpotential and smaller Tafel slope compared to its constituents. It has been found that the MoS₂/V₂O₅ composite exhibits a stable rate performance under the current density of 10 mA cm⁻² which indicates that the MoS₂/V₂O₅ composite might be a good candidate for both oxygen and hydrogen evolution reactions.

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高效的MoS2/V2O5电催化剂促进氧和氢的析出反应

电化学(EC)水分解是一种很有前途的可再生氢(H2)燃料生成和氧(O2)演化方法。具有低过电位的二硫化钼(MoS2)/五氧化钒(V2O5)复合结构电催化剂是一种很有前途的替代能源阳极和阴极材料。我们通过水热法制备了花状的MoS2/V2O5复合材料，其中V2O5生长在MoS2花瓣表面。独特的花型复合结构减轻了电极材料的表面膨胀。电化学研究表明，该复合材料具有较好的稳定性，过电位低，Tafel斜率小。结果表明，MoS2/V2O5复合材料在10 mA cm−2的电流密度下表现出稳定的速率性能，表明该复合材料可能是析氧和析氢反应的良好候选材料。图形抽象

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来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

审稿时长

>12 weeks

期刊介绍： Electrocatalysis is cross-disciplinary in nature, and attracts the interest of chemists, physicists, biochemists, surface and materials scientists, and engineers. Electrocatalysis provides the unique international forum solely dedicated to the exchange of novel ideas in electrocatalysis for academic, government, and industrial researchers. Quick publication of new results, concepts, and inventions made involving Electrocatalysis stimulates scientific discoveries and breakthroughs, promotes the scientific and engineering concepts that are critical to the development of novel electrochemical technologies. Electrocatalysis publishes original submissions in the form of letters, research papers, review articles, book reviews, and educational papers. Letters are preliminary reports that communicate new and important findings. Regular research papers are complete reports of new results, and their analysis and discussion. Review articles critically and constructively examine development in areas of electrocatalysis that are of broad interest and importance. Educational papers discuss important concepts whose understanding is vital to advances in theoretical and experimental aspects of electrochemical reactions.