Monday, December 19, 2011, 2:00 pm — Room 300 - Chemistry Bldg. 555
Under the pH and potential conditions of a PEMFC, sulfides, carbides and nitrides are all thermodynamically driven to oxidize or hydrolyze to oxides, at least at the surface. According to Poubaix diagrams, certain oxides with metals in their highest oxidation states appear to be stable under these conditions. However, since in each case the metal is in its highest oxidation state, these oxides are not conducting, but they can be partially reduced or doped with other metal cations, resulting in metallic or semiconducting behavior. With the motivation of replacing currently used carbon black catalyst supports in PEMFCs, the synthesis, characterization, chemical stability, and electrochemical testing of a family of such conducting doped metal oxide nanoparticles will be discussed.
Hosted by: Peter Khalifah
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