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Report No.

Catalytic property of platinum nanoparticle films using a few tens keV electron beam induced reduction method

Hakoda, Teruyuki; Yamamoto, Shunya; Shimoyama, Iwao   ; Aritani, Hirofumi*; Yoshikawa, Masahito

We previously observed that platinum nanoparticles films was produced on the surface of a solution containing 1 mmol/L PtCl$$_{4}$$$$^{2-}$$ ions and 0.5-20v% ethanol by irradiating with a few tens keV electron beams (EB). In the present study, the platinum films were deposited to tungsten trioxide (WO$$_{3}$$) films, which show hydrogen gasochromic property, to examine the catalytic property of the platinum films. The transmittance of 700-nm lights through the prepared (Pt/WO$$_{3}$$) films decreased in exposing to 1v% hydrogen/nitrogen gas. This decrease suggests the production of HxWO$$_{3}$$ films through the reaction of WO$$_{3}$$ films with hydrogen atoms dissociated over Pt nanoparticles. The Pt nanoparticle films prepared using a few tens keV EB induced reduction method were observed to have catalytic activity.



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