| 초록 |
Proton exchange membrane fuel cells (PEMFCs) continue to be considered as the most feasible power source, particularly for automotive applications, due to their high efficiency, relatively low operating temperature, fast startup, and low noxious emissions. Electrochemical corrosion of the carbon support in PEMFC catalysts is considered the main cause of the deterioration of fuel cell durability. PEMFCs today typically use highly dispersed Pt/C as the catalyst. However, Pt/CB catalysts have low long-term durability due to high corrosiveness in an oxygen atmosphere. To improve the long-term durability of catalysts, carbon nanomaterials have been widely studied as support materials. In this study, carbon nanotubes with high crystallinity and low defect density were added to a reduced graphene oxide support having a high specific surface area to improve the long-term durability. As a result, the hybrid support suppressed carbon oxidation and ultimately improved fuel cell durability. |
