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나노입자 연구단
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Supported Core@Shell Electrocatalysts for Fuel Cells: Close Encounter with Reality

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Title
Supported Core@Shell Electrocatalysts for Fuel Cells: Close Encounter with Reality
Author(s)
Seung Jun Hwang; Sung Jong Yoo; Jungho Shin; Yong-Hun Cho; Jong Hyun Jang; Eunae Cho; Sung , Yung Eun; Suk Woo Nam; Tae-Hoon Lim; Lee, Seung-Cheol; Kim, Soo-Kil
Publication Date
2013-02
Journal
SCIENTIFIC REPORTS, v.3, no., pp.1309 -
Publisher
NATURE PUBLISHING GROUP
Abstract
Core@shell electrocatalysts for fuel cells have the advantages of a high utilization of Pt and the modification of its electronic structures toward enhancement of the activities. In this study, we suggest both a theoretical background for the design of highly active and stable core@shell/C and a novel facile synthetic strategy for their preparation. Using density functional theory calculations guided by the oxygen adsorption energy and vacancy formation energy, Pd3Cu1@Pt/C was selected as the most suitable candidate for the oxygen reduction reaction in terms of its activity and stability. These predictions were experimentally verified by the surfactant-free synthesis of Pd3Cu1/C cores and the selective Pt shell formation using a Hantzsch ester as a reducing agent. In a similar fashion, Pd@Pd4Ir6/C catalyst was also designed and synthesized for the hydrogen oxidation reaction. The developed catalysts exhibited high activity, high selectivity, and 4,000 h of long-term durability at the single-cell level.
URI
http://pr.ibs.re.kr/handle/8788114/1384
DOI
10.1038/srep01309
ISSN
2045-2322
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
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