films using electron beams and 
-raysYamamoto, Shunya; Sugimoto, Masaki; Miyashita, Atsumi; Hakoda, Teruyuki; Yamaki, Tetsuya; Mori, Toshiyuki*
Platinum modified with cerium oxide (Pt-CeO
) is considered as promising cathode materials for use in polymer membrane electrolyte fuel cells. A key process to make this active is formation of highly dispersed Pt nanoparticles on a CeO surface. Therefore, there is a strong motivation for us to use this radiation technique for precipitation of the Pt nanoparticles on CeO films, which would be expected to be a model electrocatalyst of Pt-CeO. We deposited the CeO films on a SiO substrate by magnetron sputtering. The CeO films in an aqueous solution containing HPtCl
and CH
OH were irradiated with 2 MeV electron beams and 
Co -rays at 50 kGy at maximum. The detailed analysis revealed homogeneous precipitation of metallic Pt by the irradiation with both the radiations, suggesting high applicability of the radiation-induced precipitation method to the preparation of the model Pt-CeO electrocatalysts.
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: | 日本 |
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