PREPARATION OF PLATINUM SUPPORTED CARBON ELECTROCATALYST USING ALKYNE COMPOUND AND ITS PROPERTIES

Platinum compounds containing alkyne were supported on carbon powder as a platinum precursor, and highly dispersed platinum electrocatalysts were obtained. The compounds were produced by the reaction of chloroplatinic acid and hydrazine hydrate with acetylene, or chloroplatinic acid and propargyl alcohol. The platinum-propargyl alcohol compound showed low temperature of the thermal decomposition into platinum metal, and its electrode showed high activity for oxygen reduction in PAFC's conditions. Specific activities of these electrocatalysts were equal to the value of alloy catalysts, and this may suggest a possibility that different surface activities from pure platinum particles are induced by the influence of carbon in the precursor.