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Spontaneously Sn-Doped Bi/BiO Core-Shell Nanowires Toward High-Performance CO Electroreduction to Liquid Fuel. | LitMetric

Spontaneously Sn-Doped Bi/BiO Core-Shell Nanowires Toward High-Performance CO Electroreduction to Liquid Fuel.

Nano Lett

College of Materials Science and Engineering, State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, Hunan 410082, China.

Published: August 2021

AI Article Synopsis

Article Abstract

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

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Source
http://dx.doi.org/10.1021/acs.nanolett.1c02053DOI Listing

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