論文

査読有り
2018年4月6日

Cooperation between holey graphene and NiMo alloy for hydrogen evolution in an acidic electrolyte

ACS Catalysis
  • Yoshikazu Ito
  • ,
  • Tatsuhiko Ohto
  • ,
  • Daisuke Hojo
  • ,
  • Mitsuru Wakisaka
  • ,
  • Yuki Nagata
  • ,
  • Linghan Chen
  • ,
  • Kailong Hu
  • ,
  • Masahiko Izumi
  • ,
  • Jun-Ichi Fujita
  • ,
  • Tadafumi Adschiri

8
4
開始ページ
3579
終了ページ
3586
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acscatal.7b04091
出版者・発行元
American Chemical Society

The development of noble-metal-free hydrogen evolution reaction (HER) materials for electrochemical water splitting is the key to achieving low-cost and efficient electrocatalysis that drives electrochemical hydrogen evolution. However, the electrocatalytic activities of most non-noble metals decrease in acidic electrolytes. Here, we have fabricated non-noble-metal electrodes using a bicontinuous and open porous NiMo alloy covered by nitrogen-doped (N-doped) graphene with nanometer-sized holes. This noble-metal-free HER catalyst exhibits performance almost identical with that of a Pt/C electrode, while its original catalytic activity is preserved even in acidic electrolytes. Density functional theory calculations indicate that the interfacial fringes between the nanoholes and NiMo surface induce charge transfer and promote hydrogen adsorption and desorption. The nanometer-sized holes simultaneously provide minimal surface area for chemical reactions, while delaying NiMo dissolution in excessive amounts of acidic electrolyte. Our method for the fabrication of the NiMo alloy provides a route to a promising class of electrochemical hydrogen-producing electrodes.

リンク情報
DOI
https://doi.org/10.1021/acscatal.7b04091
ID情報
  • DOI : 10.1021/acscatal.7b04091
  • ISSN : 2155-5435
  • SCOPUS ID : 85045111416

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