Activity-Stability Relationship in Au@Pt Nanoparticles for Electrocatalysis

Title
Activity-Stability Relationship in Au@Pt Nanoparticles for Electrocatalysis
Authors
유성종정동영박수빈이현주김형준정영훈유지문안도천유승호이국승Mahdi AhmadiHuanxin JuHector D. Abruna문봉진성영은
Issue Date
2020-09
Publisher
ACS energy letters
Citation
VOL 5, NO 9-2834
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/72066
ISSN
2380-8195
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KIST Publication > Article
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