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  Partial oxidation of ethanol on vanadia catalysts on supporting oxides with different redox properties compared to propane

Beck, B., Harth, M., Hamilton, N., Carrero, C., Uhlrich, J., Trunschke, A., et al. (2012). Partial oxidation of ethanol on vanadia catalysts on supporting oxides with different redox properties compared to propane. Journal of Catalysis, 296, 120-131. doi:10.1016/j.jcat.2012.09.008.

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2012
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 Urheber:
Beck, Benjamin1, Autor
Harth, Manuel2, Autor
Hamilton, Neil3, Autor           
Carrero, Carlos1, Autor
Uhlrich, John4, Autor           
Trunschke, Annette3, Autor           
Shaikhutdinov, Shamil K.4, Autor           
Schubert, Helmut2, Autor
Freund, Hans-Joachim4, Autor           
Schlögl, Robert3, Autor           
Sauer, Joachim5, Autor
Schomäcker, Reinhard1, Autor
Affiliations:
1Technical University Berlin, Department of Chemistry, Straße des 17. Juni 124, 10623 Berlin, Germany, ou_persistent22              
2Technical University Berlin, Department of Material Science, Hardenbergstraße 40, 10623 Berlin, Germany, ou_persistent22              
3Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
4Chemical Physics, Fritz Haber Institute, Max Planck Society, ou_24022              
5Institute of Chemistry, Humboldt University, Unter den Linden 6, 10099 Berlin, Germany, ou_persistent22              

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Schlagwörter: Oxidative dehydrogenation; Supported vanadia catalysts; Ethanol; Propane; Bell–Evans–Polanyi
 Zusammenfassung: The influence of the support material of vanadia catalysts on the reaction rate, activation energies, and defect formation enthalpies was investigated for the oxidative dehydrogenation of ethanol and propane. Characterization by infrared absorption–reflection spectroscopy (IRAS), Raman and UV–vis spectroscopy verifies a high dispersion of vanadia for powder and thin-film model catalysts. The support effect of ceria, alumina, titania, and zirconia is reflected in activation energy, oxidative dehydrogenation (ODH) rate, and temperature-programmed reductions (TPR) for both catalyst systems, ethanol and propane. Impendence spectroscopy and density functional theory (DFT) calculations were used to determine the defect formation enthalpy of the vanadyl oxygen double bond, providing the scaling parameter for a Bell–Evans–Polanyi relationship. On the basis of a Mars–van-Krevelen mechanism, an energy profile for the oxidative dehydrogenation is proposed.

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Sprache(n): eng - English
 Datum: 2012-10-132012-12
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1016/j.jcat.2012.09.008
 Art des Abschluß: -

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Titel: Journal of Catalysis
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: San Diego, CA. : Academic Press
Seiten: - Band / Heft: 296 Artikelnummer: - Start- / Endseite: 120 - 131 Identifikator: ISSN: 0021-9517
CoNE: https://pure.mpg.de/cone/journals/resource/954922645027