Abstract
Tin oxide (SnO 2)/graphene nanosheets (GNS) composite was prepared by a simple chemical-solution method as the catalyst support for direct ethanol fuel cells. Then the SnO 2-GNS composites supporting Pd (Pd/SnO 2-GNS) catalysts were synthesized by a microwave-assisted reduction process. The Pd/SnO 2-GNS catalysts were characterized by using X-ray diffraction, transmission electron microscopy and energy-dispersive spectroscopy techniques. The electrocatalytic performances of Pd/SnO 2-GNS catalysts for ethanol oxidation were studied by cyclic voltammetric and chronoamperometric measurements. It was found that compared with Pd/GNS, the Pd/SnO 2-GNS catalyst showed superior electrocatalytic activity for ethanol oxidation when the mass ratio of SnCl 2·2H 2O precursor salt to graphite oxide was about 1:2.
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