Pt Atomic Layers Boosted Hydrogen Evolution Reaction in Nonacidic Media

被引：72

作者：

Guo, Yan ^{[1
,2
]}

Hou, Bo ^{[1
]}

Cui, Xiangzhi ^{[3
,4
]}

Liu, Xingchen ^{[1
]}

Tong, Xili ^{[1
]}

Yang, Nianjun ^{[5
]}

机构：

[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

[4] Univ Chinese Acad Sci, Hangzhou Inst Adv Study, Sch Chem & Mat Sci, Hangzhou 310024, Peoples R China

[5] Univ Siegen, Inst Mat Engn, D-57076 Siegen, Germany

来源：

ADVANCED ENERGY MATERIALS | 2022年 / 12卷 / 43期

关键词：

electronic effects; hydrogen evolution reaction; nonacidic media; Pt atomic layer; strain effects; OXYGEN REDUCTION; ELECTROCATALYSTS; OXIDATION; PLATINUM; NANOSTRUCTURES; NANOCUBES; CATALYSTS; KINETICS; SHELLS; ACID;

D O I：

10.1002/aenm.202201548

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Pt-based electrocatalysts exhibit high performance toward hydrogen evolution reaction (HER) since they can boost sluggish kinetics of water dissociation. To develop efficient Pt catalysts in nonacidic media, Pt electrocatalysts with a Rh core 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 of Rh@Pt-nL electrocatalysts, generating a combined effect of ligand, compressive strain, and electron transfer. The Rh@Pt-nL electrocatalysts thus offer significantly higher 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 functional theory calculations confirm that the excellent HER activity of this Rh@Pt-2L electrocatalyst in nonacidic media is attributed to an enhanced hydrogen desorption and a decreased energetic barrier during the hydrogen generating process. These Rh@Pt-nL electrocatalysts shed the light on the design of advanced catalysts to efficiently produce green hydrogen in nonacidic media.

引用

页数：11

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