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Activity-Stability Relationship in Au@Pt Nanoparticles for Electrocatalysis

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Title
Activity-Stability Relationship in Au@Pt Nanoparticles for Electrocatalysis
Author(s)
Dong Young Chung; Subin Park; Lee, H; Kim, H; Chung, YH; Ji Mun Yoo; Ahn, D; Yu, SH; Lee, KS; Ahmadi, M; Ju, HX; Abruna, HD; Yoo, SJ; Mun, BS; Yung-Eun Sung
Subject
OXYGEN REDUCTION REACTION, ; CORE-SHELL, ; EVOLUTION REACTION, ; CATALYTIC-ACTIVITY, ; SURFACE-STRUCTURE, ; DISSOLUTION, ; STRAIN, ; ALLOY, ; TRENDS
Publication Date
2020-09
Journal
ACS ENERGY LETTERS, v.5, no.9, pp.2827 - 2834
Publisher
AMER CHEMICAL SOC
Abstract
© 2020 American Chemical Society. 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
https://pr.ibs.re.kr/handle/8788114/7649
DOI
10.1021/acsenergylett.0c01507
ISSN
2380-8195
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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