| Summary: | 碩士 === 國立臺灣師範大學 === 化學系 === 95 === The Fe-core Pt-shell electrocatalysts using step by step reducing process were synthesized and characterized for the purpose of the fuel cell cathode oxygen reduction reaction. The synthesized catalysts were characterized in terms of structural morphology and catalytic activity by XRD, TEM, EDX and electrochemical measurements. In addition, we also synthesized the Pt、FePt、CoPt and FeCoPt alloy catalysts. The all nanoparticles size were 4-8nm . In order to improve activity and stability, the catalysts were loaded on the carbon black and heat-treated at 500◦C . The catalyzed ORR kinetics were also studied with using the rotating disk electrode (RDE) method. Compared to catalytic properties of the Pt、FePt、CoPt and FeCoPt alloy catalysts, the result of Fe-core Pt-shell electrocatalysts was the highest ORR activity. The results showed that the synthesized Fe-core Pt-shell catalysts have futher promotion in the ORR catalytic activity.
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