化工进展2025，Vol.44Issue(3)：1387-1395,9.DOI:10.16085/j.issn.1000-6613.2024-0392
Cu-Ag纳米团簇CO2电催化还原性能和机理
Catalytic performance and mechanism of CO2 electroreduction of Cu-Ag nanoclusters
摘要
Abstract
Electrocatalytic carbon dioxide reduction is an effective technology to mitigate CO2 emissions and promote green energy development.However,the conversion of CO2 into high-value compounds and fuels(C2+)on an industrial scale still faces many challenges.In this paper,Cu-Ag alloy nanoclusters were successfully loaded on carbon paper(CP)by magnetron co-sputtering technology,and five carbon-based Cu-Ag electrodes(Cu-Ag/CP)with different Cu/Ag ratios were prepared by adjusting the sputtering frequency of Ag targets,in which Cu-Ag20W/CP particle sizes ranged from 228nm to 285nm,and their electrochemical performance were evaluated.The results showed that Cu-Ag/CP could effectively inhibit the hydrogen evolution reaction and increase the production of C2+.Its Faraday efficiency of C2+(FEC2+)was 2.21 times that of carbon-based Cu electrode.Under constant potential of-1.07V vs.RHE and CO2 gas flow rate of 5 sccm,the FEC2+could reach 78.74%and the current density could reach 67.92mA/cm2.After continuous operation for 8h,its catalytic performance and surface structure were relatively stable.Cu-Ag/CP had a large electrochemical active area and electrical conductivity,and obviously had the characteristics of tandem catalyst.The introduction of Ag increased the formation site of *CO,and desorption *CO transferred to the Cu surface for *CO dimerization.Cu-Ag/CP was a promising electrocatalytic material,the synthesis method of this material was suitable for large-scale continuous production mode,and the product was a high-value C2+product,which was expected to provide a technical reference for the industrialization of electrocatalytic CO2 in the future.关键词
Cu-Ag催化剂/电化学/二氧化碳/还原/磁控共溅射/C2+产物Key words
Cu-Ag catalyst/electrochemistry/carbon dioxide/reduction/magnetron co-sputtering/C2+products分类
化学工程引用本文复制引用
谢鑫瑶,万芬,伏炫羽,范雨婷,陈令修,李鹏..Cu-Ag纳米团簇CO2电催化还原性能和机理[J].化工进展,2025,44(3):1387-1395,9.基金项目
国家自然科学基金(52104173) （52104173）
江苏省基础研究计划青年基金(BK20210519). （BK20210519）
