Journal
LANGMUIR
Volume 29, Issue 3, Pages 927-931Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la303809m
Keywords
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Funding
- Natural Sciences and Engineering Research Council of Canada
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Spherical Au-Pt alloy nanoparticles of 10 nm average size have been prepared on a H-terminated Si(100) substrate by an extremely simple method of dip-coating. X-ray photoelectron spectroscopy and glancing-incidence X-ray diffraction confirm the formation of Au-Pt alloy. The Au3+ ions are first reduced on the Si substrate upon dipping, and the freshly formed Au nuclei then work as a catalyst by promoting the reduction of PtCl62- ions on the Au nuclei. The subsequent interdiffusion of Au and Pt atoms leads to the observed alloy formation. The present method provides an environment-friendly, low-cost route to preparing anode electrodes in fuel cells.
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