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Mo modulation effect on the hydrogen binding energy of hexagonal-close-packed Ru for hydrogen evolution

Journal of Materials Chemistry A, ISSN: 2050-7496, Vol: 7, Issue: 6, Page: 2780-2786
2019
  • 61
    Citations
  • 0
    Usage
  • 23
    Captures
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    Mentions
  • 0
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    61
    • Citation Indexes
      61
  • Captures
    23

Article Description

As a cheaper Pt-group metal, ruthenium (Ru) is a highly competitive alternative to Pt for commercialization towards the hydrogen evolution reaction (HER). Herein, we report the modulation effect on the Gibbs free energy (ΔG ) of hexagonal-close-packed (hcp) Ru resulting from heteroatom Mo doping. In particular, for the first time the hcp MoRu crystal structure is theoretically predicted with pretty high intrinsic HER activity. Meanwhile, the Mo hetero-dopant could act as a new active site with Pt-like ΔG . Motivated by the prediction, we report a novel metal organic framework (MOF)-assisted synthetic strategy to prepare a Mo-doped hcp Ru electrocatalyst. Accordingly, the hcp MoRu catalyst exhibits an ultralow overpotential of 30.5 mV at 10 mA cm , ensuring excellent Pt-like intrinsic HER activity. More importantly, the excellent electrochemical performance measured with a proton exchange membrane (PEM) electrolyzer further highlights the promising potential of the hcp MoRu catalyst for hydrogen production.

Bibliographic Details

Zhen Zhang; Qi Feng; Qi Wang; Jiaoyan Xu; Cheng Jiang; Xiner Lu; Jiantao Fan; Meng Gu; Hui Li; Youkun Tao; Haijiang Wang; Ping Li

Royal Society of Chemistry (RSC)

Chemistry; Energy; Materials Science

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