Sensitivity of CO oxidation toward metal oxidation state in ceria-supported catalysts: an operando DRIFTS-MS study
| Autor: | Laurent Piccolo, Thanh-Son Nguyen, Fabian Kollhoff, Jörg Libuda, Mathias Laurin, Andre Kaftan |
|---|---|
| Přispěvatelé: | IRCELYON-Catalyse Hétérogène pour la Transition Energétique (CATREN), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Diffuse reflectance infrared fourier transform
Inorganic chemistry Analytical chemistry One-Step 02 engineering and technology 010402 general chemistry Mass spectrometry 01 natural sciences 7. Clean energy Catalysis Metal chemistry.chemical_compound Oxidation state [CHIM.CATA]Chemical Sciences/Catalysis Naturwissenschaftliche Fakultät 021001 nanoscience & nanotechnology [SDE.ES]Environmental Sciences/Environmental and Society 0104 chemical sciences chemistry visual_art ddc:540 visual_art.visual_art_medium 0210 nano-technology Stoichiometry Carbon monoxide |
| Zdroj: | Catalysis science and Technology Catalysis science and Technology, Royal Chemical Society of Chemistry, 2016, 6 (3), pp.818-828. ⟨10.1039/c5cy00827a⟩ |
| ISSN: | 2044-4761 |
| DOI: | 10.1039/c5cy00827a⟩ |
| Popis: | SSCI-VIDE+ECI2D+LPI; International audience; The oxidation of carbon monoxide has been studied on pristine CeO2, Rh-CeO2, and Pt-CeO2 powders prepared in one step by solution combustionsynthesis (SCS). The reaction was cycled between an oxygenrich and aCO-rich feed with regard to the stoichiometric conditions. CO2production was monitored by mass spectrometry, while the surface specieswere probed by operando DRIFTS (Diffuse Reflectance Infrared FourierTransform Spectroscopy). Whereas the reaction starts above 150 degrees Con CeO2 and Rh-CeO2 and does not depend on the state of the surface(oxidized or reduced), the reaction on Pt-CeO2 shows strong dependencyon the initial state and substantial activity is achieved at much lowertemperatures with the CO-rich feed. We relate this result to the changein the oxidation state of Pt via strong interaction with ceria. |
| Databáze: | OpenAIRE |
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