Japanese Journal of Applied Physics · 1999 · 10 citations · 0 references
Natural SciencesChemistryMaterials ScienceElectrochemistryPhysical ChemistrySurface ChemistryCatalyst CharacterizationElectrode MaterialsRedox-active MaterialsSupported CatalystsSurface CatalysisSurface OxidationCarbon SupportsCatalyst SurfacesElectrocatalystsElectrochemical ProcessesElectrochemical ReactionsOxidation StatesSurface CoverageSurface Oxidation States
Size distributions, oxidation states and surface coverage of Pt catalyst particles on carbon supports were studied by anomalous small angle scattering (ASAXS) and X-ray absorption (XANES) with X-ray energies near the Pt-L3 absorption edge. The measurements were performed in electrochemical cells to trace electrochemical reactions in situ as a function of the applied electrochemical potential. In potential sweep experiments combined in situ ASAXS and XAS measurements give direct information on the electrochemical processes of methanol oxidation and iodine adsorption on the catalyst surface.