文献类型：期刊文献

英文题名：Tunable selectivity on copper-bismuth bimetallic aerogels for electrochemical CO2 reduction

作者：Wang, Yating[1];Cheng, Ling[2];Zhu, Yihua[1];Liu, Jinze[2];Xiao, Chuqian[1];Chen, Rongzhen[1];Zhang, Ling[1];Li, Yuhang[1];Li, Chunzhong[1,2]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：317

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20220089699);WOS:【SCI-EXPANDED(收录号:WOS:000861610800002)】；

基金：This work was supported by the National Natural Science Foundation of China (22178104, 21838003, 91834301, 22008069) , the Shanghai Scientific and Technological Innovation Project (18JC1410500, 19JC1410400) , the Innovation Program of Shanghai Municipal Educa- tion Commission, "the Fundamental Research Funds for the Central Universities", and the Shanghai Sailing Program (20YF1410200) .

语种：英文

外文关键词：CO 2 electroreduction; Bimetallic CuBi aerogel; Product selectivity; Composition

摘要：Electrochemical carbon dioxide (CO2) reduction has been studied on a series of copper-bismuth (CuBi) bimetallic catalysts; however, most of the reported CuBi catalysts tend to exhibit high selectivity towards formate. Here we design four bimetallic CuxBi aerogel electrocatalysts with adjustable composition, which exhibit tunable selec-tivity for CO2 reduction. The maximum Faradaic efficiency (FE) of CO (86.6%) and formate (60.8%) over Cu100Bi and Cu5Bi is 1.2 and 5.5 times higher than that over the Cu catalyst, respectively. While for Cu50Bi, it shows enhanced selectivity for CH4 (FE=26.0%). The C2H4 FE of Cu10Bi (31.6%) is 1.6 times higher than that of the Cu catalyst. X-ray photoelectron spectroscopy analysis reveals that introduction of different amounts of Bi element leads the variation of Cu(II)/Cu(I) ratios on the catalysts surface, thereby regulating the hydrogenation capability of the reaction intermediates during CO2 reduction.