論文

査読有り
2021年1月

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

Nature Communications
  • Hu, Kailong
  • ,
  • Ohto, Tatsuhiko
  • ,
  • Nagata, Yuki
  • ,
  • Wakisaka, Mitsuru
  • ,
  • Aoki, Yoshitaka
  • ,
  • Fujita, Jun-ichi
  • ,
  • Ito, Yoshikazu

12
1
開始ページ
203
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1038/s41467-020-20503-7
出版者・発行元
Nature Publishing Group

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.

リンク情報
DOI
https://doi.org/10.1038/s41467-020-20503-7
ID情報
  • DOI : 10.1038/s41467-020-20503-7
  • ISSN : 2041-1723

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