Pt Atomic Layers Boosted Hydrogen Evolution Reaction in Nonacidic Media

Yan Guo; Bo Hou; Xiangzhi CuiXingchen LiuXili TongNianjun Yang

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Pt Atomic Layers Boosted Hydrogen Evolution Reaction in Nonacidic Media

机译：Pt Atomic Layers Boosted Hydrogen Evolution Reaction in Nonacidic Media

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Pt-based electrocatalysts exhibit high performance toward hydrogen evolutionreaction (HER) since they can boost sluggish kinetics of water dissociation. Todevelop efficient Pt catalysts in nonacidic media, Pt electrocatalysts with a Rhcore and a shell of a few Pt atomic layers (Rh@Pt_(nL), n = 1, 2, 2.6) are designed.Ultrathin Pt atomic layers on a Rh core modulate electronic structures ofRh@Pt_(nL) electrocatalysts, generating a combined effect of ligand, compressivestrain, and electron transfer. The Rh@Pt_(nL) electrocatalysts thus offer significantlyhigher HER activity in alkaline and neutral media than the RhPt alloy,Rh/C, and commercial Pt/C catalysts. The overpotential of a Rh@Pt_(2L)electrocatalyst is only 5 mV at 10 mA cm~(?2) in 1.0 M KOH. The density functionaltheory calculations confirm that the excellent HER activity of thisRh@Pt_(2L) electrocatalyst in nonacidic media is attributed to an enhancedhydrogen desorption and a decreased energetic barrier during the hydrogengenerating process. These Rh@Pt_(nL) electrocatalysts shed the light on the designof advanced catalysts to efficiently produce green hydrogen in nonacidic media.

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来源
《Advanced energy materials》 |2022年第43期|2201548.1-2201548.11|共11页
作者
Yan Guo; Bo Hou; Xiangzhi CuiXingchen LiuXili TongNianjun Yang;
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作者单位

State Key Laboratory of Coal ConversionInstitute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001, China;

Institute of Materials EngineeringUniversity of Siegen57076 Siegen, Germany;

State Key Laboratory of High-PerformanceCeramics and Superfine MicrostructureShanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050, China, School of Chemistry and Materials ScienceHangzhou Institute for Advanced StudyUniversity of Chine;

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正文语种英语
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关键词
electronic effects; hydrogen evolution reaction; nonacidic media; Pt atomic layer; strain effects;

Pt Atomic Layers Boosted Hydrogen Evolution Reaction in Nonacidic Media

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