Significant Enhancement of Hydrogen Evolution Reaction Activity by Negatively Charged Pt through Light Doping of W

Daiya Kobayashi, Hirokazu Kobayashi, Dongshuang Wu, Shinya Okazoe, Kohei Kusada, Tomokazu Yamamoto, Takaaki Toriyama, Syo Matsumura, Shogo Kawaguchi, Yoshiki Kubota, Susan Meñez Aspera, Hiroshi Nakanishi, Shigebumi Arai, Hiroshi Kitagawa

Research output: Contribution to journalArticlepeer-review

Abstract

We report novel PtW solid-solution nanoparticles (NPs) produced through electrochemical cleaning of core/shell PtW@WO3 NPs. The resulting PtW NPs achieved a record hydrogen evolution reaction (HER) performance as a class of Pt-based solid-solution alloys. A current density of 10 mA cm-2 was reached with an overpotential of 19.4 mV, which is significantly lower than that of a commercial Pt catalyst (26.3 mV). The PtW NPs also exhibited long-term stability. Theoretical calculations revealed that negatively charged Pt atoms adjacent to a W atom provide favorable hydrogen adsorption energies for the HER, realizing significantly enhanced HER activity.

Original languageEnglish
Pages (from-to)17250-17254
Number of pages5
JournalJournal of the American Chemical Society
Volume142
Issue number41
DOIs
Publication statusPublished - Oct 14 2020

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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