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Nb, Ta and V-doped TiO2 aerogels and xerogels have been synthesized as possible new alternatives to carbon blacks for Proton Exchange Membrane Fuel Cells catalyst supports. A comparative study of different dopants was realized in a single study. Nb, Ta and V showed different behaviors with respect to the final material structure and morphology, composition and electronic conductivity. They are all...
To enable a large penetration of proton exchange membrane fuel cells (PEMFC) on the market, the durability of these systems must be improved. This work aims at evaluating the durability of carbon aerogels used as cathode catalyst support and at comparing it with the durability of a commercial electrocatalyst Tanaka Kikinzoku Group (TKK). To do so, platinum was deposited on carbon aerogel. Resulting...
New organic aerogels were prepared using cellulose derivatives as precursors. The elaboration process and the structural characterisations of these porous cellulose-based materials are described in the present study. Series of monolithic gels were synthesised in acetone by crosslinking cellulose acetate with a non-toxic isocyanate via sol–gel route, using tin-based catalyst. Gelation times (ranging...
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