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

IF 14.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Journal of the American Chemical Society Pub Date : 2020-09-30 DOI:10.1021/jacs.0c07143

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*

引用次数: 69

Abstract

We report novel PtW solid-solution nanoparticles (NPs) produced through electrochemical cleaning of core/shell [email?protected]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.

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光掺杂W显著增强带负电荷Pt析氢反应活性

我们报道了通过电化学清洗核/壳制备的新型PtW固溶体纳米颗粒(NPs) [email?]保护NPs) 3。由此得到的PtW NPs作为一类pt基固溶体合金，取得了创纪录的析氢反应(HER)性能。电流密度达到10 mA cm-2，过电位为19.4 mV，明显低于商用Pt催化剂的过电位(26.3 mV)。PtW NPs也表现出长期稳定性。理论计算表明，带负电荷的Pt原子与W原子相邻，为HER提供了有利的氢吸附能，实现了HER活性的显著增强。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the American Chemical Society 化学-化学综合

CiteScore

24.40

自引率

6.00%

发文量

2398

审稿时长

1.6 months

期刊介绍： The flagship journal of the American Chemical Society, known as the Journal of the American Chemical Society (JACS), has been a prestigious publication since its establishment in 1879. It holds a preeminent position in the field of chemistry and related interdisciplinary sciences. JACS is committed to disseminating cutting-edge research papers, covering a wide range of topics, and encompasses approximately 19,000 pages of Articles, Communications, and Perspectives annually. With a weekly publication frequency, JACS plays a vital role in advancing the field of chemistry by providing essential research.