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September 30, 2020Journal of the American Chemical Society160 citations

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

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DKDaiya KobayashiHKHirokazu KobayashiDWDongshuang Wu

Key Points

  • This research aims to improve hydrogen evolution reaction performance using modified platinum-tungsten nanoparticles.
  • Produced PtW solid-solution nanoparticles through electrochemical cleaning of PtW@WO3 NPs.
  • Measured current density and overpotential to assess hydrogen evolution reaction performance.
  • Conducted theoretical calculations to analyze hydrogen adsorption energies.
  • The PtW nanoparticles achieved a current density of 10 mA cm–2 with an overpotential of 19.4 mV, compared to 26.3 mV for commercial Pt.
  • Demonstrated long-term stability of the PtW nanoparticles during reactions.
  • Theoretical calculations show that negatively charged Pt near W enhances hydrogen adsorption energies.

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.

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Cite This Study

Kobayashi et al. (2020) studied this question.

synapsesocial.com/papers/6a24f3fac00a3bd03029c23fhttps://doi.org/10.1021/jacs.0c07143
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