文献类型：期刊文献

英文题名：Isolated ultrasmall Bi nanosheets for efficient CO2-to-formate electroreduction

作者：Liu, Jinze[1,2];Li, Yuhang[1];Wang, Yating[1];Xiao, Chuqian[1];Liu, Miaomiao[1];Zhou, Xiaodong[2];Jiang, Hao[1,2];Li, Chunzhong[1,2]

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

年份：2022

卷号：15

期号：2

起止页码：1409

外文期刊名：NANO RESEARCH

收录：;EI(收录号：20213210752316);WOS:【SCI-EXPANDED(收录号:WOS:000682660400004)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 21808061, 21838003, 91834301, and 22008069), the Shanghai Scientific and Technological Innovation Project (Nos. 18JC1410500 and 19JC1410400), the Innovation Program of Shanghai Municipal Education Commission, "the Fundamental Research Funds for the Central Universities" (No. 222201718002), and the Shanghai Sailing Program (No. 20YF1410200).

语种：英文

外文关键词：bismuth; CO2 reduction; electrocatalysis; formate; ultrasmall nanosheets

摘要：Electrochemical reduction of CO2 to valuable formate as liquid fuel is a promising way to alleviate the greenhouse effect. The edge active sites in bismuth (Bi) nanosheets play a critical role in the electrochemical reduction of CO2 into formate, which enable the operation of CO2 reduction with high cathodic energy efficiency, especially under large current densities of >= 200 mA/cm(2). However, the undesirable reconstruction of small Bi nanosheets into large nanosheets leads to the decreasing of edge active sites during electrocatalysis. Here we report stable isolated ultrasmall bismuth nanosheets-synthesized by in-situ electrochemical transformation of ligands covered bismuth vanadate-on silver nanowires as an efficient electrocatalyst for CO2-to-formate reduction. The cooperative electrocatalyst achieves a formate current density of 186 mA/cm(2) and a cathodic energy efficiency of 75% for formate, which is the only best compared to the literature results. Operando Raman and morphologic measurements demonstrate that the excellent energy utilization of the electrocatalyst is originated from the rich edge active sites with Bi-O species of the ultrasmall Bi nanosheets.