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Spontaneously separated intermetallic Co3Mo from nanoporous copper as versatile electrocatalysts for highly efficient water splitting

Author

Listed:
  • Hang Shi

    (Jilin University)

  • Yi-Tong Zhou

    (Jilin University)

  • Rui-Qi Yao

    (Jilin University)

  • Wu-Bin Wan

    (Jilin University)

  • Xin Ge

    (Jilin University)

  • Wei Zhang

    (Jilin University)

  • Zi Wen

    (Jilin University)

  • Xing-You Lang

    (Jilin University)

  • Wei-Tao Zheng

    (Jilin University)

  • Qing Jiang

    (Jilin University)

Abstract

Developing robust nonprecious electrocatalysts towards hydrogen/oxygen evolution reactions is crucial for widespread use of electrochemical water splitting in hydrogen production. Here, we report that intermetallic Co3Mo spontaneously separated from hierarchical nanoporous copper skeleton shows genuine potential as highly efficient electrocatalysts for alkaline hydrogen/oxygen evolution reactions in virtue of in-situ hydroxylation and electro-oxidation, respectively. The hydroxylated intermetallic Co3Mo has an optimal hydrogen-binding energy to facilitate adsorption/desorption of hydrogen intermediates for hydrogen molecules. Associated with high electron/ion transport of bicontinuous nanoporous skeleton, nanoporous copper supported Co3Mo electrodes exhibit impressive hydrogen evolution reaction catalysis, with negligible onset overpotential and low Tafel slope (~40 mV dec−1) in 1 M KOH, realizing current density of −400 mA cm−2 at overpotential of as low as 96 mV. When coupled to its electro-oxidized derivative that mediates efficiently oxygen evolution reaction, their alkaline electrolyzer operates with a superior overall water-splitting output, outperforming the one assembled with noble-metal-based catalysts.

Suggested Citation

  • Hang Shi & Yi-Tong Zhou & Rui-Qi Yao & Wu-Bin Wan & Xin Ge & Wei Zhang & Zi Wen & Xing-You Lang & Wei-Tao Zheng & Qing Jiang, 2020. "Spontaneously separated intermetallic Co3Mo from nanoporous copper as versatile electrocatalysts for highly efficient water splitting," Nature Communications, Nature, vol. 11(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16769-6
    DOI: 10.1038/s41467-020-16769-6
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    Cited by:

    1. Zengyao Wang & Jiyi Chen & Erhong Song & Ning Wang & Juncai Dong & Xiang Zhang & Pulickel M. Ajayan & Wei Yao & Chenfeng Wang & Jianjun Liu & Jianfeng Shen & Mingxin Ye, 2021. "Manipulation on active electronic states of metastable phase β-NiMoO4 for large current density hydrogen evolution," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    2. Hu, Bo & Xu, Lianfei & Li, Yang & Sun, Fei & Wang, Zhuozhi & Yang, Mengchi & Zhang, Yangyang & Kong, Wenwen & Shen, Boxiong & Wang, Xin & Yang, Jiancheng, 2024. "Biochar and Fe2+ mediation in hydrogen production by water electrolysis: Effects of physicochemical properties of biochars," Energy, Elsevier, vol. 297(C).
    3. Ruirui Song & Jiuhui Han & Masayuki Okugawa & Rodion Belosludov & Takeshi Wada & Jing Jiang & Daixiu Wei & Akira Kudo & Yuan Tian & Mingwei Chen & Hidemi Kato, 2022. "Ultrafine nanoporous intermetallic catalysts by high-temperature liquid metal dealloying for electrochemical hydrogen production," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
    4. Shu-Pei Zeng & Hang Shi & Tian-Yi Dai & Yang Liu & Zi Wen & Gao-Feng Han & Tong-Hui Wang & Wei Zhang & Xing-You Lang & Wei-Tao Zheng & Qing Jiang, 2023. "Lamella-heterostructured nanoporous bimetallic iron-cobalt alloy/oxyhydroxide and cerium oxynitride electrodes as stable catalysts for oxygen evolution," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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