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Updated: Dec 7, 2025
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Significant Enhancement of Hydrogen Evolution Reaction Activity by Negatively Charged Pt through Light Doping of W
Daiya Kobayashi1,2, Hirokazu Kobayashi2, Dongshuang Wu2
1Nippon Soda Co. Ltd., Chiba Research Center, 12-54 Goi-minamikaigan, Ichihara, Chiba 290-0045, Japan.
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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