文献类型：期刊文献

英文题名：Probing the role of surface hydroxyls for Bi, Sn and In catalysts during CO2 Reduction

作者：Li, Jiayu[1];Li, Jinxia[2,3];Liu, Xianglin[1];Chen, Jiacheng[1];Tian, Pengfei[1];Dai, Sheng[2,3];Zhu, Minghui[1];Han, Yi-Fan[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Sci Joint Res Ctr, Shanghai 200237, Peoples R China

年份：2021

卷号：298

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

收录：;EI(收录号：20213310772460);WOS:【SCI-EXPANDED(收录号:WOS:000696923100004)】；

基金：The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. This work is sponsored by the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, Shanghai Sailing Program (19YF1410600) and Shanghai Rising-star Program (20QA1402400) . Additional support was provided by the Feringa Nobel Prize Scientist Joint Research Center.

语种：英文

外文关键词：Hydroxyl Groups; Formate; Electrochemical CO2 reduction

摘要：Electrodeposited Bi, Sn and In catalysts are employed as model catalysts to investigate the nature of active sites and the influence of surface hydroxyls on the formation of formate during CO2 electroreduction (CO2RR). With SEM, XPS, in situ XRD, electrochemical measurements and DFT calculations, the active sites are Bi-0, SnO and In2O3, with their affinities to hydroxyls following the trend of Bi-0 < SnO < In2O3. KIE analysis and in situ ATR-IR suggest two parallel pathways for formate production, with one proceeding on hydroxylated sites involving the interaction of CO2 with hydroxyls to form bicarbonates and another one proceeding on hydroxyl-free sites involving *OCHO as the key intermediate. The participation of hydroxyl groups in CO2RR follows Bi < Sn < In depending on their affinity to hydroxyls.