Zinc-Coordinated Nitrogen-Codoped Graphene as an Efficient Catalyst for Selective Electrochemical Reduction of CO 2 to CO

Electrochemical reduction of CO to value-added chemicals by using renewable electricity offers a promising strategy to deal with rising CO emission and the energy crisis. Single-site zinc-coordinated nitrogen-codoped graphene (Zn-N-G) catalyzes the electrochemical reduction of CO to CO. The Zn-N-G c...

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Bibliographic Details
Published inChemSusChem Vol. 11; no. 17; pp. 2944 - 2952
Main Authors Chen, Zhipeng, Mou, Kaiwen, Yao, Shunyu, Liu, Licheng
Format Journal Article
LanguageEnglish
Published Germany 11.09.2018
Subjects
active sites
carbon dioxide
reduction
electrocatalysis
graphene
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Summary:Electrochemical reduction of CO to value-added chemicals by using renewable electricity offers a promising strategy to deal with rising CO emission and the energy crisis. Single-site zinc-coordinated nitrogen-codoped graphene (Zn-N-G) catalyzes the electrochemical reduction of CO to CO. The Zn-N-G catalyst exhibits excellent intrinsic activity toward CO 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-N moieties, which act as the key active sites for CO formation. DFT calculations reveal the origin of enhanced activity for CO 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 CO to CO.
ISSN:1864-5631
1864-564X
DOI:10.1002/cssc.201800925