Metal–Organic Layers Leading to Atomically Thin Bismuthene for Efficient Carbon Dioxide Electroreduction to Liquid Fuel. (10th June 2020)

• Record Type: Journal Article
• Authors: Cao, Changsheng; Ma, Dong‐Dong; Gu, Jia‐Fang; Xie, Xiuyuan; Zeng, Guang; Li, Xiaofang; Han, Shu‐Guo; Zhu, Qi‐Long; Wu, Xin‐Tao; Xu, Qiang
• Is Part Of: Angewandte Chemie. Volume 132:Number 35(2020)
• Page Start: 15124
• Page End: 15130
• Publication Date: 2020-06-10
• Subjects: bismuthene -- CO2 reduction -- electrocatalysis -- flow cells -- metal–organic layers; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202005577
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Electrochemical reduction of CO2 to valuable fuels is appealing for CO2 fixation and energy storage. However, the development of electrocatalysts with high activity and selectivity in a wide potential window is challenging. Herein, atomically thin bismuthene (Bi‐ene) is pioneeringly obtained by an in situ electrochemical transformation from ultrathin bismuth‐based metal–organic layers. The few‐layer Bi‐ene, which possesses a great mass of exposed active sites with high intrinsic activity, has a high selectivity (ca. 100 %), large partial current density, and quite good stability in a potential window exceeding 0.35 V toward formate production. It even deliver current densities that exceed 300.0 mA cm −2 without compromising selectivity in a flow‐cell reactor. Using in situ ATR‐IR spectra and DFT analysis, a reaction mechanism involving HCO3 − for formate generation was unveiled, which brings new fundamental understanding of CO2 reduction. Abstract : Atomically thin bismuthene with excellent electrocatalytic CO2 reduction performance is obtained from ultrathin metal–organic layers by an in situ electrochemical transformation process. A reaction route involving HCO3 − for formate production is revealed.