Abstract
We have developed a novel anode catalyst for the direct methanol fuel cell (DMFC). Pt-C and Pt-Ru-C electrodes were prepared by a co-sputtering technique. These electrodes with a specific atomic ratio showed a remarkable O2-enhanced methanol oxidation performance and the reaction selectivity by O2 addition for methanol as a fuel. For practical utilization, the relationship between the O2-enhanced methanol oxidation activity and the thermal stability of the Pt-C and Pt-Ru-C sputtered electrodes were evaluated by a post annealing treatment. It is found that the O2-enhanced methanol oxidation activity of the Pt-Ru-C electrodes is retained if the annealing temperature is less than or equal to 100 C. Finally, the DMFC performance was assessed using a single DMFC cell incorporating a membrane electrode assembly with Pt-Ru-C which was hot pressed at 100 C.
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