Search results for " Pd catalyst"

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Metal-support interaction and redox behavior of Pt(1 wt %)/Ce0.6Zr0.4O2

2006

The catalyst Pt(1 wt %)/Ce(0.6)Zr(0.4)O(2) is studied by CO-temperature programmed reduction (CO-TPR), isothermal oxygen storage complete capacity (OSCC), X-ray absorption spectroscopy (XAS) at the Pt L(III) edge, and in situ X-ray diffraction (in situ XRD), with the aim of elucidating the role of supported metal in CO oxidation by ceria-based three-way catalysts (TWC). The redox behavior of Pt(1 wt %)/Ce(0.6)Zr(0.4)O(2) is compared to that of bare ceria-zirconia. OSCC of redox-aged Pt/ceria-zirconia is twice that of bare ceria-zirconia, and the maximum of CO consumption occurs at a temperature about 300 K lower than redox-aged ceria-zirconia. XAS analysis allows one to evidence the formati…

X-ray absorption spectroscopyMaterials scienceAbsorption spectroscopyOxygen storageAlloyXRD XAFS Pd catalystAnalytical chemistrySinteringengineering.materialRedoxSurfaces Coatings and FilmsCatalysisMetalCrystallographySettore CHIM/03 - Chimica Generale E Inorganicavisual_artMaterials Chemistryvisual_art.visual_art_mediumengineeringPhysical and Theoretical Chemistry

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