Activity-Stability Relationship in Au@Pt Nanoparticles for Electrocatalysis

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Despite breakthroughs in the activity of electrocatalysts for the oxygen reduction reaction (ORR), the development of nanoscale ORR electrocatalysts is still hindered by their instability. Here, to bridge the functional link between activity and stability, well-controlled Au@Pt (core@shell) nanoparticles are investigated. In situ monitoring of atomic dissolution and physicochemical analysis in conjunction with theoretical calculations reveal that the atomic-level stability of Au@Pt nanoparticle is attributed to the low surface coverage of OH and oxide on Pt, balancing between strain and ligand effect of Au at the interface. Considering the relationships in activity-stability-oxophilicity, the functional links between activity and stability in the ORR are discussed, and the regulation of oxophilicity is suggested as a guideline for designing highly active and durable electrocatalysts for fuel cell applications.
Publisher
AMER CHEMICAL SOC
Issue Date
2020-09
Language
English
Article Type
Article
Citation

ACS ENERGY LETTERS, v.5, no.9, pp.2827 - 2834

ISSN
2380-8195
DOI
10.1021/acsenergylett.0c01507
URI
http://hdl.handle.net/10203/276867
Appears in Collection
CH-Journal Papers(저널논문)
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