Volume 134, Issue 7 e202111683
Forschungsartikel

Promoting CO2 Electroreduction Kinetics on Atomically Dispersed Monovalent ZnI Sites by Rationally Engineering Proton-Feeding Centers

Jiayi Chen

Jiayi Chen

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

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Dr. Zhongjian Li

Dr. Zhongjian Li

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

Institute of Zhejiang University—Quzhou, Quzhou, 324000 China

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Xinyue Wang

Xinyue Wang

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

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Prof. Dr. Xiahan Sang

Prof. Dr. Xiahan Sang

Nanostructure Research Center, Wuhan University of Technology, Wuhan, 430070 China

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Sixing Zheng

Sixing Zheng

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

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Prof. Dr. Shoujie Liu

Prof. Dr. Shoujie Liu

Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, 515031 China

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Dr. Bin Yang

Dr. Bin Yang

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

Institute of Zhejiang University—Quzhou, Quzhou, 324000 China

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Prof. Dr. Qinghua Zhang

Prof. Dr. Qinghua Zhang

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

Institute of Zhejiang University—Quzhou, Quzhou, 324000 China

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Prof. Dr. Lecheng Lei

Prof. Dr. Lecheng Lei

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

Institute of Zhejiang University—Quzhou, Quzhou, 324000 China

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Prof. Dr. Liming Dai

Prof. Dr. Liming Dai

Australian Carbon Materials Centre(A-CMC), School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052 Australia

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Prof. Dr. Yang Hou

Corresponding Author

Prof. Dr. Yang Hou

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

Institute of Zhejiang University—Quzhou, Quzhou, 324000 China

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First published: 04 October 2021
Citations: 10

Abstract

Electrocatalytic reduction of CO2 (CO2RR) to value-added chemicals is of great significance for CO2 utilization, however the CO2RR process involving multi-electron and proton transfer is greatly limited by poor selectivity and low yield. Herein, We have developed an atomically dispersed monovalent zinc catalyst anchored on nitrogenated carbon nanosheets (Zn/NC NSs). Benefiting from the unique coordination environment and atomic dispersion, the Zn/NC NSs exhibit a superior CO2RR performance, featuring a high current density up to 50 mA cm−2 with an outstanding CO Faradaic efficiency of ≈95 %. The center ZnI atom coordinated with three N atoms and one N atom that bridges over two adjacent graphitic edges (Zn-N3+1) is identified as the catalytically active site. Experimental results reveal that the twisted Zn-N3+1 structure accelerates CO2 activation and protonation in the rate-determining step of *CO2 to *COOH, while theoretical calculations elucidate that atomically dispersed Zn-N3+1 moieties decrease the potential barriers for intermediate COOH* formation, promoting the proton-coupled CO2RR kinetics and boosting the overall catalytic performance.

Conflict of interest

The authors declare no conflict of interest.

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