Kinetic Studies of the Uav Applications of Direct Borohydride Fuel Cell(Dbfc) -Phase Ii

Sodium borohydride fuel cells could utilize about seven out of a theoretically maximum eight electrons, exhibiting high fuel utilization efficiency. DBFCs are considered attractive energy suppliers, especially for portable applications. To avoid the hydrolysis reaction of sodium borohydride in producing hydrogen and to promote the direct electrochemistry reaction of borohydride to 8 electrons transfer are the key issues of DBFC. Au electrode is known to be slow for catalysed reactions of BH4? oxidation. So our study was to prepare Au- alloy supported on carbon and to investigate them for electrocatalytic activity with respect to BH4 ? oxidation by carrying out fundamental electrochemical experiments. The carbon-supported Pt-modified Au nanoparticles were prepared by two different reduction processes, the simultaneous reduction of Pt and Au on carbon process and the successive reduction of Au then Pt on carbon process. These two catalysts were investigated as the anode catalysts for a direct borohydride fuel cell. No metter successive reduction or simultaneous reduction method, results show Au-Pt catalysts have much higher catalytic activity for the direct oxidation of BH4-.

Project ID:PB10308-3335
External Project ID:MOST103-2221-E182-057