Supported Core@Shell Electrocatalysts for Fuel Cells: Close Encounter with Reality
SCIE
SCOPUS
- Title
- Supported Core@Shell Electrocatalysts for Fuel Cells: Close Encounter with Reality
- Authors
- HWANG, SEUNG JUN; YOO, SUNG JONG; SHIN, JUNGHO; CHO, YONG-HUN; JANG, JONG HYUN; CHO, EUNAE; SUNG, YUNG-EUN; NAM, SUK WOO; LIM, TAE-HOON; LEE, SEUNG-CHEOL; KIM, SOO-KIL
- Date Issued
- 2013-02-19
- 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
- https://oasis.postech.ac.kr/handle/2014.oak/99956
- DOI
- 10.1038/srep01309
- ISSN
- 2045-2322
- Article Type
- Article
- Citation
- Scientific Reports, vol. 3, page. 1309, 2013-02-19
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