文献类型：期刊文献

英文题名：Constructing grain boundary to stabilize Cu0/Cu+ interfacial sites for efficient CO2 reduction reaction

作者：Yang, Saiwu[1];Shen, Yongjun[1];Mao, Xiaoqing[1];Li, Congcong[1];Liu, Zhongliang[1];Wang, Bin[2];Zhu, Delin[2];Li, Huihui[1];Li, Chunzhong[1,3]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Key Lab Ultrafine Mat Educ, Shanghai 200237, Peoples R China;[2]Sichuan Lutianhua Co Ltd, Luzhou, Peoples R China;[3]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Shanghai, Peoples R China

年份：2025

卷号：71

期号：7

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20251518211550);WOS:【SCI-EXPANDED(收录号:WOS:001461960900001)】；

基金：This work was supported by the National Natural Science Foundation of China (U22B20143, U24A20546, 22478121), Shanghai Municipal Science and Technology Major Project, the Science and Technology Commission of Shanghai Municipality (22dz1205900), and the Fundamental Research Funds for the Central Universities (JKD01241702).

语种：英文

外文关键词：electrochemical CO2 reduction; grain boundary; stabilization of Cu+ species; synergistic reaction

摘要：The electrochemical CO2 reduction reaction (CO2RR) to multi-carbon (C2+) products derived by renewable energy represents a promising strategy for mitigating CO(2 )emissions. One of the intensively studied strategies is to stabilize Cu+ species on catalysts to facilitate the adsorption of *CO intermediates. However, the reductive environment during CO2RR renders the Cu+ species on the catalyst surface susceptible to reduction to Cu-0. Here, we developed a GB-Cu2O-Cu catalyst featuring enriched grain boundaries via an in situ electrochemical reduction process to stabilize Cu+ species, resulting in an abundance of Cu-0/Cu+ interfacial active sites. In situ x-ray diffraction (XRD) and Raman spectroscopy further revealed that the presence of grain boundaries effectively shields the Cu+ species on the catalyst surface from undergoing reduction during CO2RR, facilitating the concentration of *CO intermediates and thus promoting C-C dimerization to C2+ products.