Superiority of CuSe as a non-nobel electrocatalyst among copper chalcogens for overall water splitting reactions

IF 8 Q1 ENERGY & FUELS

Energy nexus Pub Date : 2024-04-01 DOI:10.1016/j.nexus.2024.100289

Mousumi Mondal , Sabyasachi Maity , Anirban Ghosh , Sujit Kumar Ghosh , Swapan Kumar Bhattacharya

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Abstract

Among the transition metals copper is one of the cheapest earth- abandoned elements which can enhance electrocatalytic activity. The Cu-based catalysts are superior for catalytic performance and stability in alkaline media for oxygen evolution reaction (OER) and exhibit high activity in acidic media for hydrogen evolution reaction (HER).Synthesized CuSe nanoparticle is found as the most efficient bifunctional electrocatalyst among the synthesized Cu chalcogenides for water splitting reaction. Electrocatalytic performance for water oxidation was investigated in alkaline solution1(M) KOH for OER and 0.5 (M) H₂SO₄ for HER. To achieve 10 mA/cm², it was observed an over potential (mV) of 343 for OER and 126 for HER, which are much smaller than these of CuS (385,320) and CuO (410, 345) studied. In this article, we have elucidated some essential criteria need to be specified to evaluate the water splitting performance including onset potential, overpotential, Tafel slope, turnover frequency (TOF), and stability of the copper chalcogenide nanoparticles.

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在整体水分离反应中，CuSe 作为非贵金属铜合物电催化剂的优越性

在过渡金属中，铜是最廉价的弃土元素之一，可以提高电催化活性。在碱性介质中，铜基催化剂在氧进化反应（OER）中具有优异的催化性能和稳定性；在酸性介质中，铜基催化剂在氢进化反应（HER）中表现出较高的活性。在碱性溶液 1(M) KOH 中研究了水氧化的电催化性能（OER），在 0.5(M) H2SO4 中研究了水氧化的电催化性能（HER）。在达到 10 mA/cm2 时，观察到 OER 和 HER 的过电位（mV）分别为 343 和 126，远小于所研究的 CuS（385,320）和 CuO（410,345）。在这篇文章中，我们阐明了评估水分裂性能所需的一些基本标准，包括起始电位、过电位、塔菲尔斜率、翻转频率（TOF）和铜瑀纳米粒子的稳定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Energy nexus Energy (General), Ecological Modelling, Renewable Energy, Sustainability and the Environment, Water Science and Technology, Agricultural and Biological Sciences (General)

CiteScore

7.70

自引率

0.00%

发文量

审稿时长

109 days