Preparation of Electrocatalysts for Polymer Electrolyte Fuel Cell Cathodes from Au-Pt Core-Shell Nanoparticles Synthesized by Simultaneous Aqueous-Phase Reduction

PVP-protected Au-Pt core-shell NPs were prepared by simultaneous aqueous phase reduction of Au and Pt, and they were deposited on C black support. The obtained powder was processed in air at 170[degrees]C to remove the PVP. Stability of the core-shell catalyst in water was improved after the removal...

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Bibliographic Details
Published in:Platinum metals review 2013-10, Vol.57 (4), p.317-317
Main Authors: Yamaguchi, W, Tai, Y
Format: Article
Language:English
Subjects:
Catalysts
Deposition
Electrolytes
Gold
Nanoparticles
Platinum
Reduction (electrolytic)
Shells
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Summary:PVP-protected Au-Pt core-shell NPs were prepared by simultaneous aqueous phase reduction of Au and Pt, and they were deposited on C black support. The obtained powder was processed in air at 170[degrees]C to remove the PVP. Stability of the core-shell catalyst in water was improved after the removal of PVP. The oxidation state of the Pt shell was found to be very close to zero. The Au-Pt core-shell catalyst exhibited mass activity 20% higher than that of a Pt catalyst.
ISSN:0032-1400
1471-0676