Supported Core@Shell Electrocatalysts for Fuel Cells: Close Encounter with Reality
- Supported Core@Shell Electrocatalysts for Fuel Cells: Close Encounter with Reality
- 황승준; 유성종; 신정호; 조용훈; 장종현; 조은애; 성영은; 남석우; 임태훈; 이승철; 김수길
- fuel cell; electrocatalysts; core-shell; oxygen reduction reaction; hydrogen oxidation reaction
- Issue Date
- Scientific Reports
- VOL 3, 1309-1-1309-7
- 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.
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