High-density asymmetric iron dual-atom sites for efficient and stable electrochemical water oxidation

Lili Zhang, Ning Zhang, Huishan Shang (), Zhiyi Sun, Zihao Wei, Jingtao Wang (), Yuanting Lei, Xiaochen Wang, Dan Wang, Yafei Zhao, Zhongti Sun (), Fang Zhang, Xu Xiang, Bing Zhang and Wenxing Chen ()
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Lili Zhang: Zhengzhou University
Ning Zhang: Changchun Institute of Applied Chemistry Chinese Academy of Sciences
Huishan Shang: Zhengzhou University
Zhiyi Sun: Beijing Institute of Technology
Zihao Wei: Beijing Institute of Technology
Jingtao Wang: Zhengzhou University
Yuanting Lei: Zhengzhou University
Xiaochen Wang: Zhengzhou University
Dan Wang: Zhengzhou University
Yafei Zhao: Zhengzhou University
Zhongti Sun: Jiangsu University
Fang Zhang: Beijing Institute of Technology
Xu Xiang: Beijing University of Chemical Technology
Bing Zhang: Zhengzhou University
Wenxing Chen: Beijing Institute of Technology

Nature Communications, 2024, vol. 15, issue 1, 1-13

Abstract: Abstract Double-atom catalysts (DACs) have opened distinctive paradigms in the field of rapidly developing atomic catalysis owing to their great potential for promoting catalytic performance in various reaction systems. However, increasing the loading and extending the service life of metal active centres represents a considerable challenge for the efficient utilization of DACs. Here, we rationally design asymmetric nitrogen, sulfur-coordinated diatomic iron centres on highly defective nitrogen-doped carbon nanosheets (denoted A-Fe2S1N5/SNC, A: asymmetric), which possess the atomic configuration of the N2S1Fe-FeN3 moiety. The abundant defects and low-electronegativity heteroatoms in the carbon-based framework endow A-Fe2S1N5/SNC with a high loading of 6.72 wt%. Furthermore, A-Fe2S1N5/SNC has a low overpotential of 193 mV for the oxygen evolution reaction (OER) at 10 mA cm−2, outperforming commercial RuO2 catalysts. In addition, A-Fe2S1N5/SNC exhibits extraordinary stability, maintaining > 97% activity for over 2000 hours during the OER process. This work provides a practical scheme for simultaneously balancing the activity and stability of DACs towards electrocatalysis applications.

Date: 2024
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DOI: 10.1038/s41467-024-53871-5

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