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Cathodic corrosion as a facile and universal method for the preparation of supported metal single atoms

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Abstract

Top-down strategy has been generally adopted for preparation of metal single atom catalysts (SACs) due to the simplified synthetic process, metal economics, and scalability characteristics. Herein, we propose a general top-down route to convert metal nanoparticles into uniformly dispersed metal single atoms in mild electrochemical environment via a facile cathodic corrosion process. Within the synthetic process, Pt nanoparticles precursors are transformed into migrating Pt single atoms (Pt1) driven by a high negative potential; and subsequently these mobile Pt atoms are trapped and stabilized by N coordination sites of N-doped carbon paper (NCP). The as-prepared Pt1/NCP electrodes exhibit a superior catalytic activity toward hydrogen evolution reaction (HER) with a low overpotential of 0.022 V at 10 mA/cm2 and a low Tafel slope of 28.5 mV/dec as well as a long-term durability. Notably, the proposed electrochemical atomic migration strategy shows a promising generality for fabricating other metal single atoms (e.g., Pd, Ir, Cu), which may open a new avenue for metallic SACs preparation.

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Acknowledgements

This work is supported by Foundation from Institute of Materials CAEP (Nos. TP03201703, TP03201802, and CX2019018) and the National Natural Science Foundation of China (Nos. 51701192 and 21706246).

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  1. Rui Li and **gsong Xu contributed equally to this work.

Authors and Affiliations

  1. Institute of Materials, China Academy of Engineering Physics, Jiangyou, 621907, China

    Rui Li, Qingkai Zhao, Wensheng Ren, Rongguang Zeng, **ayan Yan, **gwen Ba, Tao Tang & Wenhua Luo

  2. Science and Technology on Surface Physics and Chemistry Laboratory, Jiangyou, 621908, China

    **gsong Xu & Qifa Pan

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  1. Rui Li
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Li, R., Xu, J., Zhao, Q. et al. Cathodic corrosion as a facile and universal method for the preparation of supported metal single atoms. Nano Res. 15, 1838–1844 (2022). https://doi.org/10.1007/s12274-021-3767-3

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