A Reconstructed Cu2P2O7 Catalyst for Selective CO2 Electroreduction to Multicarbon Products

被引：130

作者：

Sang, Jiaqi ^{[1
,2
]}

Wei, Pengfei ^{[1
,2
]}

Liu, Tianfu ^{[1
]}

Lv, Houfu ^{[1
]}

Ni, Xingming ^{[3
]}

Gao, Dunfeng ^{[1
]}

Zhang, Jiangwei ^{[1
]}

Li, Hefei ^{[1
,2
]}

Zang, Yipeng ^{[1
]}

Yang, Fan ^{[3
]}

Liu, Zhi ^{[3
]}

Wang, Guoxiong ^{[1
]}

Bao, Xinhe ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China

[3] Shanghai Tech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2022年 / 61卷 / 05期

基金：

国家重点研发计划; 中国博士后科学基金; 中国国家自然科学基金;

关键词：

CO2; electroreduction; Cu2P2O7; Electrochemical in situ reconstruction; Multicarbon products; REDUCTION; EFFICIENCY; ELECTRODES; MECHANISM; COVERAGE; STATE;

D O I：

10.1002/anie.202114238

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The electrochemical CO2 reduction reaction (CO2RR) over Cu-based catalysts shows great potential for converting CO2 into multicarbon (C2+) fuels and chemicals. Herein, we introduce an A(2)M(2)O(7) structure into a Cu-based catalyst through a solid-state reaction synthesis method. The Cu2P2O7 catalyst is electrochemically reduced to metallic Cu with a significant structure evolution from grain aggregates to highly porous structure under CO2RR conditions. The reconstructed Cu2P2O7 catalyst achieves a Faradaic efficiency of 73.6 % for C2+ products at an applied current density of 350 mA cm(-2), remarkably higher than the CuO counterparts. The reconstructed Cu2P2O7 catalyst has a high electrochemically active surface area, abundant defects, and low-coordinated sites. In situ Raman spectroscopy and density functional theory calculations reveal that CO adsorption with bridge and atop configurations is largely improved on Cu with defects and low-coordinated sites, which decreased the energy barrier of the C-C coupling reaction for C2+ products.

引用

页数：7

共 41 条

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