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标题: Synergistic Geometric and Electronic Effects in Bi-Cu Bimetallic Catalysts for CO2 Electroreduction to Formate over a Wide Potential Window

作者: Wang, M (Wang, Miao); Liu, S (Liu, Shuai); Chen, B (Chen, Bo); Tian, FY (Tian, Fengyu); Peng, C (Peng, Chuang)

来源出版物: ACS SUSTAINABLE CHEMISTRY & ENGINEERING DOI: 10.1021/acssuschemeng.2c01409 提前访问日期: APR 2022

摘要: ABSTRACT: Electrochemical CO2 reduction to formate provides a prospective avenue to produce more valuable products. Compared to pure Bi and Cu, the Bi-Cu (2:1) bimetallic catalyst optimizes the interfacial electronic structure through the electronic interaction between Bi and Cu. The Bi-Cu (2:1) catalyst exhibits a high faradaic efficiency of 94.1% at -1.0 V vs RHE, high faradaic efficiency (>90%) toward formate in a wide potential window (500 mV), and long-term stability of 20 h. The electrocatalytic mechanism is identified by combining in situ FT-IR and DFT calculations, which demonstrates that formate prefers to be formed through the HCOO* pathway. High faradaic efficiency in a wide potential window can be ascribed to stable active sites and the decreased energy barrier in HCOO* and formate. This study further provides inspirations for promoting the electrocatalytic selectivity of bimetallic catalysts through effective interfacial electronic modulation.

作者关键词: Formate; Bimetallic catalyst; Interfacial modulation; Electronic interaction; Electrocatalytic mechanism

地址: [Wang, Miao; Chen, Bo; Tian, Fengyu; Peng, Chuang] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Liu, Shuai] Univ Nottingham Ningbo China, New Mat Inst, Ningbo 315100, Peoples R China.

[Liu, Shuai] Univ Nottingham Ningbo China, Dept Chem & Environm Engn, Ningbo 315100, Peoples R China.

通讯作者地址: Peng, C (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

电子邮件地址: Chuang.Peng@whu.edu.cn

影响因子：9.224