文献类型：期刊文献

英文题名：Efficient Co2 Electroreduction to Formate Via Bi-Sn/Ceo2 Nanorod

作者：Xue, Jing Fu, Xiangmin Geng, Shuo Li, Ziwei Li, Min

第一作者：Xue, Jing

机构：[1] School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, 550025, China; [2] School of Civil Engineering, Guizhou Institute of Technology, Guiyang, 550003, China

第一机构：School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, 550025, China

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230105099)

语种：英文

外文关键词：Cerium oxide - Density functional theory - Design for testability - Electrolytes - Electrolytic reduction - Electronic structure - Fourier transform infrared spectroscopy - Infrared reflection - Molar ratio - Nanorods - Potassium compounds

摘要：Electrocatalytic CO2 reduction reaction (CO2RR) to produce formate is one effective route for CO2 neutralization and renewable energy storage. Developing efficient catalyst is crucial to enhance the Faradaic efficiency (FE) of formate and retard the competing H2 evolution reaction. Herein, we design Bi- and Sn-anchored CeO2 nanorods catalysts with the valance state and oxygen vacancy (Vo) concentration controllable for CO2RR by reduction treatment at different environment. The m-Bi1Sn2Ox/CeO2 with moderate H2 composition reduction condition and suitable Sn/Bi molar ratio achieves a remarkable FEformate of 87.7% at -1.18 V vs. RHE compared with other catalysts. Additionally, the selectivity of formate was maintained over 20 hrs with an outstanding FEformate of above 80% in 0.5 M KHCO3 electrolyte. The outstanding CO2RR performance was attributed to the highest surface Sn2+ concentration which improves the formate selectivity. Further, the electron delocalization effect between Bi, Sn, and CeO2 tunes electronic structure and Vo concentration, promoting the CO2 adsorption and activation as well as facilitating the formation of key intermediates HCOO* as evidenced by the in-situ attenuated total reflection infrared measurements and density functional theory calculations. This work provides an interesting measure for the rational design of efficient CO2RR catalysts via valance state and Vo concentration control. ? 2023, The Authors. All rights reserved.