Journal
TOPICS IN CATALYSIS
Volume 56, Issue 12, Pages 1059-1064Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11244-013-0070-x
Keywords
Fuel cells; Electrocatalysis; Core-shell catalyst; Pt monolayer; Cu underpotential deposition; Oxygen reduction
Categories
Funding
- Brookhaven National laboratory [DE-AC02-98CH10886]
- Korea Institute of Energy Research (KIER) [B3-2415]
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Designing novel cathode materials for a proton exchange membrane fuel cell with high activity for the oxygen reduction reaction, low Pt loading, and enhanced long-term stability is imperative for its sustainability. To date, Pt monolayer based electrocatalysts deposited on a metallic core substrate have shown promising possibilities. In this study, we synthesized bimetallic IrCu nanoparticles and used them as a core for Pt monolayer electrocatalysts. It was found that the de-alloyed IrCu nanoparticle surfaces increased both the mass and specific activities of the resulting Pt monolayer catalyst. In addition, we demonstrated that Pt monolayer electrocatalysts with a de-alloyed IrCu core have a better stability than those using a non-dealloyed core based on a 5,000 potential cycling test. These data describe a new simple synthesis of a high-performance catalyst suitable for practical applications.
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