Suppressing hydrogen evolution in copper oxides for CO2 electroreduction by tuning metal oxide supports

IF 2.6 4区化学 Q3 ELECTROCHEMISTRY

Journal of Solid State Electrochemistry Pub Date : 2025-04-23 DOI:10.1007/s10008-025-06313-1

Nathan R. Harrison, Aziz Genc, Thomas J. A. Slater, Andrea Folli

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引用次数: 0

Abstract

In this work, a range of supported copper oxides were synthesised via a simple deposition precipitation method, and their catalytic performance for the hydrogen evolution reaction (HER) was analysed, evaluating the influence of the support on catalytic activity. Electrochemical measurements showed that Cu₂O containing catalysts had superior HER activity compared to CuO containing catalysts, achieving lower HER overpotentials and Tafel slope values. The SnO₂ support showed the largest HER suppression, desirable for use within the CO₂ reduction reaction (CO₂RR), reducing the activity of the competing reaction, achieving a large HER overpotential value of 0.73 V vs. RHE, along with a small HER exchange current density of 5.93 µA/cm², for Cu₂O/SnO₂, shown to be through possessing large HER charge-transfer resistance and small electrochemically active surface areas. The ZnO support was also shown to be adequate at supressing the HER activity, whilst also achieving the highest electrochemically active surface area for the reduction reactions to proceed on, out of all supported catalysts assessed in this work.

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通过调整金属氧化物载体抑制CO2电还原铜氧化物中的析氢

本文通过简单沉积沉淀法合成了一系列负载型氧化铜，并分析了它们对析氢反应（HER）的催化性能，评价了载体对催化活性的影响。电化学测量表明，与含CuO催化剂相比，含Cu2O催化剂具有更好的HER活性，具有更低的HER过电位和Tafel斜率值。SnO2载体表现出最大的HER抑制，适合用于CO2还原反应（CO2RR），降低了竞争反应的活性，与RHE相比，Cu2O/SnO2的HER过电位值较大，为0.73 V， HER交换电流密度较小，为5.93 μ a /cm2，这表明Cu2O/SnO2具有较大的HER电荷转移电阻和较小的电化学活性表面积。ZnO载体也被证明足以抑制HER活性，同时在本工作中评估的所有负载催化剂中，ZnO载体也获得了最高的电化学活性表面积，用于还原反应的进行。

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

Journal of Solid State Electrochemistry 工程技术-电化学

CiteScore

4.80

自引率

4.00%

发文量

227

审稿时长

4.1 months

期刊介绍： The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry. The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces. The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis. The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.