Volume 59, Issue 2 pp. 798-803
Research Article

Elucidating the Electrocatalytic CO2 Reduction Reaction over a Model Single-Atom Nickel Catalyst

Dr. Song Liu

Dr. Song Liu

CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 China

University of Chinese Academy of Sciences, Beijing, 100049 China

School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459 Singapore

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Prof. Hong Bin Yang

Prof. Hong Bin Yang

School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459 Singapore

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Dr. Sung-Fu Hung

Dr. Sung-Fu Hung

Department of Chemistry, National (Taiwan) University, No. 1, Sec. 4, Roosevelt Rd, Taipei, 10617 Taiwan

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Jie Ding

Jie Ding

CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 China

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Weizheng Cai

Weizheng Cai

School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459 Singapore

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Linghui Liu

Linghui Liu

CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 China

School of Chemistry and Chemical Engineering, Chongqing University, Shapingba 174, Chongqing, 400044 P. R. China

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Dr. Jiajian Gao

Dr. Jiajian Gao

School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459 Singapore

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Dr. Xuning Li

Dr. Xuning Li

School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459 Singapore

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Xinyi Ren

Xinyi Ren

CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 China

University of Chinese Academy of Sciences, Beijing, 100049 China

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Zhichong Kuang

Zhichong Kuang

CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 China

University of Chinese Academy of Sciences, Beijing, 100049 China

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Prof. Yanqiang Huang

Corresponding Author

Prof. Yanqiang Huang

CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 China

Dalian National Laboratory for Clean Energy, Dalian, 116023 China

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Prof. Tao Zhang

Prof. Tao Zhang

CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 China

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Prof. Bin Liu

Corresponding Author

Prof. Bin Liu

School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459 Singapore

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First published: 28 October 2019
Citations: 411

Dedicated to Dalian Institute of Chemical Physics on the occasion of its 70th anniversary

Graphical Abstract

Ni-che reaction: In situ reduction of nickel(II) 2,9,16,23-tetra(amino)phthalocyanine, anchored on the surface of carbon nanotubes, yields nickel single atoms. Advanced spectroscopy of the single-atom catalyst reveals that Ni+ is a highly active catalytic site for CO2 activation and reduction.

Abstract

Designing effective electrocatalysts for the carbon dioxide reduction reaction (CO2RR) is an appealing approach to tackling the challenges posed by rising CO2 levels and realizing a closed carbon cycle. However, fundamental understanding of the complicated CO2RR mechanism in CO2 electrocatalysis is still lacking because model systems are limited. We have designed a model nickel single-atom catalyst (Ni SAC) with a uniform structure and well-defined Ni-N4 moiety on a conductive carbon support with which to explore the electrochemical CO2RR. Operando X-ray absorption near-edge structure spectroscopy, Raman spectroscopy, and near-ambient X-ray photoelectron spectroscopy, revealed that Ni+ in the Ni SAC was highly active for CO2 activation, and functioned as an authentic catalytically active site for the CO2RR. Furthermore, through combination with a kinetics study, the rate-determining step of the CO2RR was determined to be *CO2+H+→*COOH. This study tackles the four challenges faced by the CO2RR; namely, activity, selectivity, stability, and dynamics.

Conflict of interest

The authors declare no conflict of interest.

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