过电位
石墨烯
法拉第效率
催化作用
电化学
氮气
X射线光电子能谱
过渡金属
材料科学
化学工程
无机化学
二氧化碳电化学还原
化学
纳米技术
电极
一氧化碳
有机化学
物理化学
工程类
作者
Zhipeng Chen,Kaiwen Mou,Shunyu Yao,Licheng Liu
出处
期刊:Chemsuschem
[Wiley]
日期:2018-07-26
卷期号:11 (17): 2944-2952
被引量:107
标识
DOI:10.1002/cssc.201800925
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 0.39 V. X-ray absorption fine structure and X-ray photoelectron spectroscopy both confirm the presence of isolated Zn-Nx 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.
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