Significant Enhancement of Hydrogen Evolution Reaction Activity by Negatively Charged Pt through Light Doping of W
Significant Enhancement of Hydrogen Evolution Reaction Activity by Negatively Charged Pt through Light Doping of W
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DOI：
10.1021/jacs.0c07143
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发表时间：
2020-10-14
影响因子：
15
通讯作者：
Kitagawa, Hiroshi
中科院分区：
文献类型：
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作者：
Kobayashi, Daiya;Kobayashi, Hirokazu;Kitagawa, Hiroshi
我们报告了新的PtW固溶体纳米粒子（NPs）通过电化学清洗的核/壳PtW@WO，NPs。作为一类Pt基固溶体合金，所得PtW NPs实现了创纪录的析氢反应（HER）性能。电流密度为10 mA cm（-2）。达到19.4 mV的过电位，这明显低于商业Pt催化剂的过电位（26.3 mV）。PtW NP还表现出长期稳定性。理论计算表明，与W原子相邻的带负电荷的Pt原子为HER提供了有利的氢吸附能，实现了显着增强的HER活性。
We report novel PtW solid-solution nanoparticles (NPs) produced through electrochemical cleaning of core/shell PtW@WO, 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.