(600r) WO3 Modified Omc Supported Pt-Pd/WO3-Omc Electrocatalysts

This study presents the experimental investigation of the promotional effects of WO₃ on the bimetallic PtPd/WO₃-OMC catalysts for formic acid oxidation. CV measurement of Pd/WO₃-OMC exhibits 15 % higher anodic current activity than that of Pd/OMC catalyst while the peak potential is also shifted negatively. In the Pt-Pd catalyst samples, the small addition of Pt improves the performances of PdPt/WO₃-OMC catalyst significantly.  The atomic ratio2 for Pd/Pt catalysts, displays best catalytic efficiency, which shows current activity 5.2 times higher than that of Pd₁Pt₂/WO₃-OMC catalyst. It also shows persistent activities in extended period of runs with the increase of carbon monoxide (CO) tolerance effects. BET surface area analysis shows that WO₃ modification enhances the surface characteristics of OMC with pore size slightly decreased.  Many techniques have used to characterize the synthesized catalysts.