Polyhedral Carbon Nanofoams as Working Electrodes in PEM Fuel Cells
(English)Manuscript (preprint) (Other (popular science, discussion, etc.))
Polyhedral carbon nanofoams (PNF-C´s) of various pore sizes were prepared and tested as working electrode support materials with relatively low Pt loading in Polymer Electrolyte Membrane Fuell Cell (PEMFs). The electrochemically active surface area (ECSA), carbon double layer capacitance (DLC), as well as fuel performance were evaluated by Cyclic Voltammetry (CV), Polarization Curves (PC) and Electrochemica lImpedance Spectroscopy (EIS) and compared to that of commercial working electrode material. The 3D interconnected, highly porous open structure, good electrical conductivity and unique surface characteristics of PNF-C´s offer increased mass transport and access to catalytic sites in fuel cells. One of the PNF-C supported Pt catalysts studied here out performed the standard commercial Pt/Vulcan catalyst due to its lower ionomer resistance and increased mass transport character.
IdentifiersURN: urn:nbn:se:kth:diva-27157OAI: oai:DiVA.org:kth-27157DiVA: diva2:375089
QC 201012072010-12-072010-12-072010-12-08Bibliographically approved