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

Title
Supported Core@Shell Electrocatalysts for Fuel Cells: Close Encounter with Reality
Authors
황승준유성종신정호조용훈장종현조은애성영은남석우임태훈이승철김수길
Keywords
fuel cell; electrocatalysts; core-shell; oxygen reduction reaction; hydrogen oxidation reaction
Issue Date
2013-02
Publisher
Scientific Reports
Citation
VOL 3, 1309-1-1309-7
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://pubs.kist.re.kr/handle/201004/44570
ISSN
20452322
Appears in Collections:
KIST Publication > Article
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