Spontaneously Sn-Doped Bi/BiOx Core–Shell Nanowires Toward High-Performance CO2 Electroreduction to Liquid Fuel

• DOI: 10.1021/acs.nanolett.1c02053
• Publication Date: 2021-08-09T19:00:32Z
• Authors: Yang Zhao; Xunlin Liu; Zhixiao Liu; Xin Lin; Jiao Lan; Yanlong Zhang; Ying-Rui Lu; Ming Peng; Ting-Shan Chan; Yongwen Tan
• Keywords: Reversible hydrogen electrode

Electrochemical CO2 reduction provides a promising strategy to product value-added fuels and chemical feedstocks. However, it remains grand challenge further reduce the overpotentials increase current density for large-scale applications. Here, spontaneously Sn doped Bi/BiOx nanowires (denoted as Bi/Bi(Sn)Ox NWs) with core–shell structure were synthesized by an electrochemical dealloying strategy. The NWs exhibit impressive formate selectivity over 92% from −0.5 −0.9 V versus reversible hydrogen electrode (RHE) achieve of 301.4 mA cm–2 at −1.0 vs RHE. In-situ Raman spectroscopy theoretical calculations reveal that introduction atoms into BiOx species can promote stabilization *OCHO intermediate on Bi(Sn)Ox surface suppress competitive H2/CO production. This work effective in situ construction metal/metal oxide hybrid composites heteroatom doping new insights promoting conversion practical