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Functional link between surface low-coordination sites and the electrochemical durability of Pt nanoparticles

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Title
Functional link between surface low-coordination sites and the electrochemical durability of Pt nanoparticles
Author(s)
Dong Young Chung; Heejong Shin; Ji Mun Yoo; Lee K.-S.; Lee N.-S.; Kisuk Kang; Yung-Eun Sung
Publication Date
2016-12
Journal
JOURNAL OF POWER SOURCES, v.334, no., pp.52 - 57
Publisher
ELSEVIER SCIENCE BV
Abstract
A promising strategy for achieving enhanced catalytic activity involves the use of nanoscale electrocatalysts; however, their low stability remains a major challenge. Among the various performance-degradation mechanisms, atomic dissolution is known to cause severe nanoparticle deactivation. To date, the factors influencing these catalysts’ durability are not understood. Herein, we assess the role of low-coordination surface sites, focusing on the atomic dissolution of Pt nanoparticles. The density of low-coordination sites was finely controlled, and no significant size change occurred. Based on our findings, we suggest that the initial low-coordination sites trigger metal dissolution, which subsequently accelerates Pt dissolution. We believe that controlling the surface coordination number can open new routes for the design of highly durable nanoscale electrocatalysts. © 2016 Elsevier B.V.
URI
https://pr.ibs.re.kr/handle/8788114/3207
ISSN
0378-7753
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
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