Abner Sharon, Chen Aicheng
Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2 W1, Canada.
Nanoscale. 2024 Jul 11;16(27):12967-12981. doi: 10.1039/d4nr00909f.
The search for an efficient and stable catalyst for the electrochemical reduction of CO to value-added chemicals is especially critical for lowering the atmospheric CO concentration. In this study, self-supported cobalt/copper nanostructured catalysts were designed, where the influences of the elemental composition and acid-etching on their efficiency towards the CO reduction reaction were studied. The developed Co/Cu catalysts showed superb catalytic activity with a low onset potential at -0.2 V RHE. Gas and liquid product analysis revealed that formate and CO were the main products. It was observed that lower reductive potentials were favourable for formate production, while higher reductive potentials were more favourable for CO formation. electrochemical FTIR studies were further conducted to gain insight into the CO reduction mechanism. The novel synthetic procedure reported in this study leads to promising electrocatalysts with high efficiencies for the conversion of CO into valuable products.
寻找一种高效且稳定的用于将CO电化学还原为增值化学品的催化剂对于降低大气中CO浓度尤为关键。在本研究中，设计了自支撑钴/铜纳米结构催化剂，并研究了元素组成和酸蚀刻对其CO还原反应效率的影响。所开发的Co/Cu催化剂在-0.2 V（相对于可逆氢电极）的低起始电位下表现出卓越的催化活性。气液产物分析表明，甲酸盐和CO是主要产物。观察到较低的还原电位有利于甲酸盐生成，而较高的还原电位更有利于CO生成。进一步进行了电化学傅里叶变换红外光谱研究以深入了解CO还原机理。本研究报道的新型合成方法产生了有望用于将CO高效转化为有价值产物的电催化剂。
