The Fablication of nano-platinum particles using low energy electron beam irradiation

Isozumi, Yukihiro; Hakoda, Teruyuki; Yamamoto, Shunya; Aritani, Hirofumi*; Yoshikawa, Masahito

We confirmed reduction of Pt ion, preparation of particles and catalytic activity of these particles in 10mL solution including 5mM Pt ion and ethanol induced by low energy electron beam(EB) irradiation that has a high dose rate to confirm the availability of radiation induced reduction using low energy EB for one kind of method, it prepare noble metal particles having catalytic activity. The maximum dose of Pt particles was shown in a 10% ethanol. Diameters of these Pt particles that were produced in this irradiated solution were mostly 2 to 5nm, and a part of these particles coagulated each other to become particles with sizes of a few tens to a few hundred nm. The fact these Pt particles has a hydrogen dissociation catalytic ability was induced by the coloration of tungsten trioxide, which is one of hydrogen gasochromic materials. These results suggest that low energy EB irradiation is applicable method for preparation fine noble metal particles having catalytic activity.