| 초록 |
Catalysts for polymer electrolyte membrane fuel cells are generally prepared by loading Pt on carbon black support, but they cause various problems such as low catalyst durability and expensive platinum. In this study, reduce graphene oxide (rGO) support was controlled through ultrasonic treatment to improve surface area. The more oxygen-containing functional groups in graphene support, the more easily carbon corrosion and Pt dissolution occurs and eventually adversely affects the long-term durability. The performance and stability of Pt/srGO with appropriate size and defect were enhanced compared with Pt/rGO and Pt/CB. Also, the ORR performance of Pt/rGO is mainly dependent on the morphology of Pt particles. Thus, the Pt particles were controlled by adjusting microwave conditions to confirm the effect of Pt particles on ORR. The surface area of Pt particles affects the catalytic activity, so the catalyst with the appropriate particles showed the best catalytic activity. |
