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

作者：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, S. Arai, Hiroshi Kitagawa · 发表于：Journal of the American Chemical Society · 年份：2020 · DOI：10.1021/jacs.0c07143 · 被引用次数：160 · 研究领域：Electrocatalysts for Energy Conversion、Advanced battery technologies research、Fuel Cells and Related Materials

We report novel PtW solid-solution nanoparticles (NPs) produced through electrochemical cleaning of core/shell PtW@WO 3 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.