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- Title
Pt Atomic Layers Boosted Hydrogen Evolution Reaction in Nonacidic Media.
- Authors
Guo, Yan; Hou, Bo; Cui, Xiangzhi; Liu, Xingchen; Tong, Xili; Yang, Nianjun
- Abstract
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@PtnL, n = 1, 2, 2.6) are designed. Ultrathin Pt atomic layers on a Rh core modulate electronic structures of Rh@PtnL electrocatalysts, generating a combined effect of ligand, compressive strain, and electron transfer. The Rh@PtnL 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@Pt2L 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@Pt2L electrocatalyst in nonacidic media is attributed to an enhanced hydrogen desorption and a decreased energetic barrier during the hydrogen generating process. These Rh@PtnL electrocatalysts shed the light on the design of advanced catalysts to efficiently produce green hydrogen in nonacidic media.
- Subjects
HYDROGEN evolution reactions; DENSITY functional theory; CHARGE exchange; ELECTROCATALYSTS; RHODIUM catalysts; ELECTRONIC structure
- Publication
Advanced Energy Materials, 2022, Vol 12, Issue 43, p1
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.202201548