Journal
NANOSCALE HORIZONS
Volume 5, Issue 2, Pages 316-324Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9nh00533a
Keywords
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Funding
- U.S. Department of Energy (US DOE), Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Office (FCTO)
- U.S. Department of Energy [89233218CNA000001]
- Argonne National Laboratory a U.S. Department of Energy Office of Science laboratory [DE-AC02-06CH11357]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
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Development of high-performance hydrogen oxidation catalysts with ultralow precious metal loading is critical to the development of next-generation anion-exchange membrane fuel cells. Here, a novel Ru-rich Pt-RuO2 heterojunction catalyst was synthesized via a solvothermal process followed by thermal treatment. The Pt-RuO2 catalyst has ultrafine Pt clusters and a heterojunction interface between Pt and RuO2, which facilitates high hydrogen oxidation activity while minimizing adverse adsorption of the phenyl group in the polymer electrolyte. The performance of a membrane electrode assembly employing the Pt-RuO2/C reached a peak power density of 0.77 W cm(-2) with an anode Pt loading of 25 mu g(Pt) cm(-2), achieving a specific power of 31 W mg(Pt)(-1) under H-2/O-2 conditions. The combined analysis of electrode performance and cost indicates that Pt-RuO2/C is one of the most promising catalysts that is approaching the U.S. DOE 2020 performance and cost targets for transportation applications.
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