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Catalytic activity of graphene-covered non-noble metals governed by proton penetration in electrochemical hydrogen evolution reaction

Author

Listed:
  • Kailong Hu

    (University of Tsukuba)

  • Tatsuhiko Ohto

    (Osaka University)

  • Yuki Nagata

    (Max Planck Institute for Polymer Research)

  • Mitsuru Wakisaka

    (Toyama Prefectural University
    PRESTO, Japan Science and Technology Agency)

  • Yoshitaka Aoki

    (PRESTO, Japan Science and Technology Agency
    Hokkaido University)

  • Jun-ichi Fujita

    (University of Tsukuba)

  • Yoshikazu Ito

    (University of Tsukuba
    PRESTO, Japan Science and Technology Agency)

Abstract

Graphene-covering is a promising approach for achieving an acid-stable, non-noble-metal-catalysed hydrogen evolution reaction (HER). Optimization of the number of graphene-covering layers and the density of defects generated by chemical doping is crucial for achieving a balance between corrosion resistance and catalytic activity. Here, we investigate the influence of charge transfer and proton penetration through the graphene layers on the HER mechanisms of the non-noble metals Ni and Cu in an acidic electrolyte. We find that increasing the number of graphene-covering layers significantly alters the HER performances of Ni and Cu. The proton penetration explored through electrochemical experiments and simulations reveals that the HER activity of the graphene-covered catalysts is governed by the degree of proton penetration, as determined by the number of graphene-covering layers.

Suggested Citation

  • Kailong Hu & Tatsuhiko Ohto & Yuki Nagata & Mitsuru Wakisaka & Yoshitaka Aoki & Jun-ichi Fujita & Yoshikazu Ito, 2021. "Catalytic activity of graphene-covered non-noble metals governed by proton penetration in electrochemical hydrogen evolution reaction," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-020-20503-7
    DOI: 10.1038/s41467-020-20503-7
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    Cited by:

    1. Yong-Qing Yan & Ya Chen & Zhao Wang & Li-Hua Chen & Hao-Lin Tang & Bao-Lian Su, 2023. "Electrochemistry-assisted selective butadiene hydrogenation with water," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    2. J. Cai & E. Griffin & V. H. Guarochico-Moreira & D. Barry & B. Xin & M. Yagmurcukardes & S. Zhang & A. K. Geim & F. M. Peeters & M. Lozada-Hidalgo, 2022. "Wien effect in interfacial water dissociation through proton-permeable graphene electrodes," Nature Communications, Nature, vol. 13(1), pages 1-7, December.

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