CNF-supported Platinum Electrocatalysts Synthesized Using Plasma-Assisted Sputtering in Pulse Conditions for the Application in a High-Temperature PEM Fuel Cell

摘要

Nanostructured platinum catalysts for a high-temperature proton-exchange membrane (PEM) fuel cellbased on polybenzimidazole (PBI) doped by H3PO4 were synthesized by magnetron-ion sputtering ofplatinum on carbon nano-fibers (CNF) in an impulse mode. The resulting catalysts were studied bytransmission electron microscopy and X-ray diffraction. These catalysts with platinum particles sizefrom 4 to 6 nm uniformly distributed over the CNF surface exhibit high efficiency. The electrodesbased on the synthesized electrocatalysts were tested in a liquid electrolyte and as a component of PBI- 2 based fuel cell. The fuel cell had power density ca. 300 mW/cm . Degradation tests showed thatcarbon carrier oxidation mainly determined the catalyst stability and stability of CNF was higher incomparison with Vulcan XC-72.