Low-temperature propene combustion over Pt/K-βAl2O3 electrochemical catalyst: Characterization, catalytic activity measurements, and investigation of the NEMCA effect
| Autor: | Fernando Dorado, José Luis Valverde, Antonio de Lucas-Consuegra, R. Karoum, Philippe Vernoux |
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| Přispěvatelé: | 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) |
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Inorganic chemistry 02 engineering and technology 010402 general chemistry Electrochemistry Combustion Heterogeneous catalysis 01 natural sciences Catalysis Electrochemical promotion Propene chemistry.chemical_compound Permanent NEMCA effect NEMCA effect Physical and Theoretical Chemistry Fourier transform infrared spectroscopy VOCs abatement Pt catalyst [CHIM.CATA]Chemical Sciences/Catalysis 021001 nanoscience & nanotechnology [SDE.ES]Environmental Sciences/Environmental and Society 0104 chemical sciences chemistry Propene combustion Titration Cyclic voltammetry 0210 nano-technology |
| Zdroj: | Journal of Catalysis Journal of Catalysis, Elsevier, 2007, 251, pp.474-484. ⟨10.1016/j.jcat.2007.06.031⟩ |
| ISSN: | 0021-9517 1090-2694 |
| DOI: | 10.1016/j.jcat.2007.06.031⟩ |
| Popis: | International audience; Studies of characterization and electrochemical promotion of the electrochemical catalyst Pt/K-βAl2O3 for low-temperature propene combustion are reported for the first time. Characterization of Pt/K-βAl2O3 by surface titration, SEM, and XRD revealed useful information about the electrochemical catalyst. On the other hand, it was found that Pt/K-βAl2O3 can be strongly promoted at low temperature for propene oxidation under both near-stoichiometric and oxygen-rich conditions. For instance, under C3H6/O2: 2000 ppm/7% at 200 °C, a rate enhancement ratio (ρCO2) of 7 was achieved under application of VWR=−2 V, increasing propene conversion from 10 to 70%. In addition, the origin of the NEMCA effect was investigated using cyclic voltammetry along with CO2 analysis as well as FTIR measurements and SEM-EDX analysis. These techniques showed that the presence of more stable and effective promoter phases (potassium oxides and superoxides) were responsible for both a permanent NEMCA effect and a higher promotional phenomenon in comparison to sodium conductors. |
| Databáze: | OpenAIRE |
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