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Charge-asymmetry Fe1Cu single-atom alloy catalyst for efficient oxygen reduction reaction

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Abstract

The development of high-efficient and low-cost oxygen reduction reaction (ORR) electrocatalysts is crucial for the practical applications of metal-air batteries. One promising way is to develop Fe single-atom catalysts. However, the single active center and inherent electronic structure of Fe single-atom catalysts lead to the undesirable adsorption of multiple ORR intermediates. Herein, a charge-asymmetry single-atom alloy (SAA) catalyst with Fe–Cu dual sites supported on nitrogen-doped carbon nanosheet (Fe1Cu SAA/NC) was constructed. Various characterizations manifest the existence of electron interaction between Fe and Cu in Fe1Cu SAA/NC, which facilitates the adsorption of ORR intermediate for fast kinetics. Consequently, the charge-asymmetry Fe1Cu SAA/NC exhibits much faster ORR kinetics with a half-wave potential of 0.917 V vs. reversible hydrogen electrode (RHE), outperforming its counterparts in the references. Furthermore, Fe1Cu SAA/NC still maintains a high half-wave potential with only a drop of 5 mV after 5000 cycles, indicating excellent stability. This work provides a new strategy to design highly active and non-noble metal ORR electrocatalysts, which hold great potential for various catalytic applications.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (No. 51902013). The authors thank the BL4B7B in the Beijing Synchrotron Radiation Facility (BSRF) and BL14W1 in the Shanghai Synchrotron Radiation Facility (SSRF) for help with characterizations.

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Authors and Affiliations

  1. School of Chemical & Environmental Engineering, China University of Mining and Technology, Beijing, 100083, China

    Xudong Niu & Dongyao Xu

  2. Institute of Water Ecology and Environment, Chinese Research Academy of Environmental Sciences, Beijing, 100083, China

    Jian Wei

  3. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China

    Jiajing Pei

  4. Engineering Research Center of Advanced Rare Earth Materials, Department of Chemistry, Tsinghua University, Beijing, 100084, China

    Rui Sui

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  1. Xudong Niu
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  2. Jian Wei
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Niu, X., Wei, J., Xu, D. et al. Charge-asymmetry Fe1Cu single-atom alloy catalyst for efficient oxygen reduction reaction. Nano Res. 17, 4702–4710 (2024). https://doi.org/10.1007/s12274-023-6317-3

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