Zinc-Coordinated Nitrogen-Codoped Graphene as an Efficient Catalyst for Selective Electrochemical Reduction of CO2 to CO

被引：120

作者：

Chen, Zhipeng ^{[1
,2
]}

Mou, Kaiwen ^{[1
,2
]}

Yao, Shunyu ^{[1
]}

Liu, Licheng ^{[1
]}

机构：

[1] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, Qingdao 266101, Shandong, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

CHEMSUSCHEM | 2018年 / 11卷 / 17期

基金：

中国国家自然科学基金;

关键词：

active sites; carbon dioxide; electrocatalysis; graphene; reduction; METAL-ORGANIC FRAMEWORKS; OXYGEN REDUCTION; ELECTROCATALYTIC REDUCTION; ACTIVE-SITES; HIGHLY EFFICIENT; AQUEOUS CO2; CARBON; ELECTROREDUCTION; CONVERSION; DESIGN;

D O I：

10.1002/cssc.201800925

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Electrochemical reduction of CO2 to value-added chemicals by using renewable electricity offers a promising strategy to deal with rising CO2 emission and the energy crisis. Single-site zinc-coordinated nitrogen-codoped graphene (Zn-N-G) catalyzes the electrochemical reduction of CO2 to CO. The Zn-N-G catalyst exhibits excellent intrinsic activity toward CO2 reduction, reaching a faradaic efficiency of 91% for CO production at a low overpotential of 0.39V. X-ray absorption fine structure and X-ray photoelectron spectroscopy both confirm the presence of isolated Zn-N-x moieties, which act as the key active sites for CO formation. DFT calculations reveal the origin of enhanced activity for CO2 reduction on Zn-N-G catalysts. This work provide further understanding of the active centers on transition metal-nitrogen-carbon (M-N-C) catalysts for electrochemical reduction of CO2 to CO.

引用

页码：2944 / 2952

页数：9

共 73 条

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