Synthesis of Nano-size Platinum Particles by Proton Irradiation

Recently, the preparation and characterization of nanoparticles have become a noticeable topic because of their peculiar optical, electronic, magnetic and catalytic properties. The peculiar property of nanoparticles is strongly dependent on the shape, size and distribution of particle. Platinum(Pt) nanoparticles are usually used in proton exchange membrane fuel cells (PEMFC) as cathode exchange membrane fuel cells (PEMFC) as cathode electrocatalysts for oxygen reduction reactions in relatively low temperature. In general, nanoparticles can be synthesized such as, photochemical, chemical reduction and radiation chemical reduction. However, chemical reduction often can't provide suitable control of particle shape and size. In this study, we investigated a novel method to obtain of Pt nanoparticle by using proton beam irradiation in Pt aqueous solution. In addition experiments, we studied on the effect of surfactant and beam current as well as beam energy which could control to the size and degree of dispersion of particles in the solution