Nanostructuring of PEFC Electrode Catalysts Using Carbon Nanofibers

Polymer electrolyte fuel cells (PEFCs) are promising energy conversion systems, while further improvement of electrochemical performance as well as a considerable decrease in noble metal loading are essential for their commercialization. Applications of carbon nanofibers, instead of state-of-the-art carbon black, may realize such improvements by nanostructuring PEFC electrode catalysts. In general, carbon black with a satisfactory electronic conductivity possesses a large specific surface area, suitable for catalyst dispersion, while carbon nanofibers possess an excellent electronic conductivity along with the fibers. In this study, carbon nanofibers are applied as electrode fillers and catalyst supports.