Volume 63, Issue 6 e202318246
Research Article

Boosting Electrocatalytic Carbon Dioxide Reduction via Self-Relaxation of Asymmetric Coordination in Fe-Based Single Atom Catalyst

Zhaoyong Jin

Zhaoyong Jin

School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Electron Microscopy Center, Jilin University, 130012 Changchun, China

These authors contributed equally to this work.

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Dongxu Jiao

Dongxu Jiao

School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Electron Microscopy Center, Jilin University, 130012 Changchun, China

These authors contributed equally to this work.

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Yilong Dong

Yilong Dong

School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Electron Microscopy Center, Jilin University, 130012 Changchun, China

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Lin Liu

Lin Liu

School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Electron Microscopy Center, Jilin University, 130012 Changchun, China

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Jinchang Fan

Jinchang Fan

School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Electron Microscopy Center, Jilin University, 130012 Changchun, China

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Ming Gong

Ming Gong

School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Electron Microscopy Center, Jilin University, 130012 Changchun, China

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Xingcheng Ma

Xingcheng Ma

School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Electron Microscopy Center, Jilin University, 130012 Changchun, China

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Ying Wang

Ying Wang

School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Electron Microscopy Center, Jilin University, 130012 Changchun, China

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Wei Zhang

Wei Zhang

School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Electron Microscopy Center, Jilin University, 130012 Changchun, China

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Prof. Lei Zhang

Corresponding Author

Prof. Lei Zhang

College of Chemistry, Jilin University, 130012 Changchun, China

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Prof. Dr. Zhi Gen Yu

Prof. Dr. Zhi Gen Yu

Institute of High Performance Computing (IHPC), Agency for Science, Technology and Research (A*STAR), 1 Fusionopolis Way, #16-16 Connexis, 138632 Singapore, Singapore

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Prof. Dr. Damien Voiry

Prof. Dr. Damien Voiry

Institut Européen des Membranes, IEM, UMR 5635, Université Montpellier, ENSCM, CNRS, 34000 Montpellier, France

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Weitao Zheng

Corresponding Author

Weitao Zheng

School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Electron Microscopy Center, Jilin University, 130012 Changchun, China

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Prof. Dr. Xiaoqiang Cui

Corresponding Author

Prof. Dr. Xiaoqiang Cui

School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Electron Microscopy Center, Jilin University, 130012 Changchun, China

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First published: 15 December 2023
Citations: 59

Graphical Abstract

We implemented an asymmetric coordination Fe−S1N3 SAC with significant geometric distortion. The Fe−S1N3 sites demonstrate distinctive self-relaxation behavior in response to different adsorption intermediates during the CO2RR process. The dynamic change in bond length enabled independent regulation of the *COOH and *CO intermediates adsorption energies, effectively breaking the linear scale relationship and enhancing the intrinsic activity.

Abstract

Addressing the limitations arising from the consistent catalytic behavior observed for various intermediates during the electrochemical carbon dioxide reduction reaction (CO2RR) poses a significant challenge in the optimization of catalytic activity. In this study, we aimed to address this challenge by constructing an asymmetric coordination Fe single atom catalyst (SCA) with a dynamically evolved structure. Our catalyst, consisting of a Fe atom coordinated with one S atom and three N atoms (Fe−S1N3), exhibited exceptional selectivity (CO Faradaic efficiency of 99.02 %) and demonstrated a high intrinsic activity (TOF of 7804.34 h−1), and remarkable stability. Using operando XAFS spectra and Density Functional Theory (DFT) calculations, we elucidated the self-relaxation of geometric distortion and dynamic evolution of bond lengths within the catalyst. These structure changes enabled independent regulation of the *COOH and *CO intermediate adsorption energies, effectively breaking the linear scale relationship and enhancing the intrinsic activity of CO2RR. This study provides valuable insights into the dynamic evolution of SACs and paves the way for targeted catalyst designs aimed to disrupt the linear scaling relationships.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

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