Abstract
Novel tin-oxide (SnO2)-coated single-walled carbon nanotube (SWNT) bundles supporting platinum (Pt)electrocatalysts for ethanol oxidation were developed for direct ethanol fuel cells.SnO2-coatedSWNT (SnO2–SWNT) bundles were synthesized by a simple chemical-solution route.SnO2–SWNT bundlessupporting Pt (Pt/SnO2–SWNTs) electrocatalysts and SWNT-supported Pt (Pt/SWNT) electrocatalysts were preparedby an ethylene glycol reduction method. The catalysts were physically characterized using TGA,XRD and TEM and electrochemically evaluated through cyclic voltammetry experiments. ThePt/SnO2–SWNTs showed greatly enhanced electrocatalytic activity for ethanoloxidation in acid medium, compared to the Pt/SWNT. The optimalSnO2 loadingof Pt/SnO2–SWNT catalysts with respect to specific catalytic activity for ethanol oxidation was alsoinvestigated.
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