Eliminating dissolution of platinum-based electrocatalysts at the atomic scale.
Journal
Nature materials
ISSN: 1476-4660
Titre abrégé: Nat Mater
Pays: England
ID NLM: 101155473
Informations de publication
Date de publication:
Nov 2020
Nov 2020
Historique:
received:
27
01
2020
accepted:
16
06
2020
pubmed:
22
7
2020
medline:
22
7
2020
entrez:
22
7
2020
Statut:
ppublish
Résumé
A remaining challenge for the deployment of proton-exchange membrane fuel cells is the limited durability of platinum (Pt) nanoscale materials that operate at high voltages during the cathodic oxygen reduction reaction. In this work, atomic-scale insight into well-defined single-crystalline, thin-film and nanoscale surfaces exposed Pt dissolution trends that governed the design and synthesis of durable materials. A newly defined metric, intrinsic dissolution, is essential to understanding the correlation between the measured Pt loss, surface structure, size and ratio of Pt nanoparticles in a carbon (C) support. It was found that the utilization of a gold (Au) underlayer promotes ordering of Pt surface atoms towards a (111) structure, whereas Au on the surface selectively protects low-coordinated Pt sites. This mitigation strategy was applied towards 3 nm Pt
Identifiants
pubmed: 32690912
doi: 10.1038/s41563-020-0735-3
pii: 10.1038/s41563-020-0735-3
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1207-1214Commentaires et corrections
Type : ErratumIn
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