文献类型：期刊文献

英文题名：Ligand-confined bismuth based nanodots for robust carbon dioxide reduction to liquid fuel at 1 A/cm2

作者：Li, Yuhang[1];Chen, Rongzhen[1];Liu, Jinze[2];Cheng, Ling[2];Zhao, Jiawen[1];Lu, Yun[1];Feng, Jiaqi[1];Gong, Ziming[1];Li, Chunzhong[1,2]

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

年份：2023

卷号：267

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20225013240678);WOS:【SCI-EXPANDED(收录号:WOS:000895675400008)】；

基金：This work was supported by the National Natural Science Foundation of China (22178104, U22B20143, 21838003, 22008069), the Shanghai Scientific and Technological Innovation Project (22dz1205900), ``the Fundamental Research Funds for the Central Universities", and the Shanghai Sailing Program (20YF1410200).

语种：英文

外文关键词：Bismuth; CO2 electroreduction; Formate; Ligand-confinement; Nanodot

摘要：The bismuth oxide (BiOx) derived electrocatalysts hold the promise for effective carbon dioxide (CO2) reduction to formate as liquid fuel. However, the disappearance of the active edge sites during the elec-troreduction, due to the spontaneous aggregation of nanoclusters into large sheets, lowers the perfor-mance at high current densities. Here we develop a ligand-confined strategy to stabilize Bi-BiOx nanodots with a diameter of ca. 5 nm, enabling efficient CO2 reduction to formate with high activity (working current density up to 1 A/cm2) and high selectivity (Faradaic efficiency of >95 %). We find that the poly(methacrylic acid) ligand would in-situ transform into carbon shell as a confinement area that limits the growth of Bi-BiOx nanodots, thus keeping the abundant active edge sites for CO2 reduction at wide working potentials. We also note that the carboxyl group in ligand remained on nanodots may provide oxygen donors for Bi-BiOx to maintain the selective formate generation at high current densities.(c) 2022 Elsevier Ltd. All rights reserved.