文献类型：期刊文献

英文题名：Efficient electrochemical CO2 reduction via CuAg doped CeO2

作者：Luo, Mei Fu, Xiangmin Geng, Shuo Li, Ziwei Li, Min

第一作者：Luo, Mei

通信作者：Li, ZW[1];Li, M[2]

机构：[1]Guizhou Univ, Sch Chem & Chem Engn, Guiyang 550025, Peoples R China;[2]Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China

第一机构：Guizhou Univ, Sch Chem & Chem Engn, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Sch Chem & Chem Engn, Guiyang 550025, Peoples R China;corresponding author), Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China.|贵州理工学院土木工程学院;贵州理工学院;

年份：2023

卷号：347

外文期刊名：FUEL

收录：;EI(收录号：20230042336);Scopus(收录号：2-s2.0-85153530384);WOS:【SCI-EXPANDED(收录号:WOS:000989525100001)】；

基金：This work was supported by National Natural Science Foundation of China (22168013, 22279024), Natural Science Foundation of Guizhou (ZK[2022]074, [2019]2872 and [2020]1Y037).

语种：英文

外文关键词：Electrochemical CO 2 reduction; Cu-Ag bimetallic catalysts; Electronic delocalization effect; Oxygen vacancy; Mechanism understanding

摘要：CO2 electrocatalysis reduction (CO2RR) is considered to be one of the most efficient methods to achieve carbon neutralization and realize renewable energy conversion. Unfortunately, at present, CO2 electrocatalysts confront the challenges of high overpotential, low selectivity, and poor stability. Ag based electrocatalysts are considered to be the most promising catalysts for CO production via CO2RR on a large scale, due to their relatively higher catalytic performance and more abundant reserves compared with other noble metals. Whereas, they still suffer from high cost. In this paper, we design bimetallic CuAg/CeO2-6 catalysts by the simple impregnation method for CO2RR, exhibiting the highest FECO of 84% at -1.1 V vs. RHE compared with other bimetallic catalysts with different Cu/Ag ratio and monometal catalysts. XPS results demonstrate the electron delocalization effect not only between Cu and Ag bimetals but also among CeO2 support. This effect results in the electronic structure change and the formation of the highest concentration of oxygen vacancies, promoting the CO2 adsorption and activation as well as facilitating the formation of COOH* intermediates as evidenced by the in situ ATR-SEIRAS measurements. Additionally, the highest active surface for CO2RR and the smallest charge resistance of CuAg/ CeO2-6 also contributes to its good CO2RR performance. This work sheds light on the design of other efficient CO2RR catalysts through electronic structure tuning by bimetallic strategy.