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V(V) species in supported catalysts: Analysis and performance in oxidative dehydrogenation of ethane
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SYSNO ASEP 0327292 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title V(V) species in supported catalysts: Analysis and performance in oxidative dehydrogenation of ethane Author(s) Grygar, Tomáš (UACH-T)
Čapek, L. (CZ)
Adam, J. (CZ)
Machovič, V. (CZ)Source Title Journal of Electroanalytical Chemistry. - : Elsevier - ISSN 1572-6657
Roč. 633, č. 1 (2009), s. 127-136Number of pages 10 s. Language eng - English Country CH - Switzerland Keywords reductive dissolution ; ion insertion ; solid-state speciation Subject RIV CF - Physical ; Theoretical Chemistry CEZ AV0Z40320502 - UACH-T (2005-2011) UT WOS 000268938900017 DOI doi:10.1016/j.jelechem.2009.05.003 Annotation Voltammetry of immobilized microparticles (VMP), diffuse reflectance UV-vis spectroscopy (DRS), X-ray powder diffraction (XRD), and Raman spectroscopy were used to identify V(V) oxidic species in vanadia catalysts supported on titania, alumina, mesoporous silicas, and composites of Al2O3 and TiO2 with montmorillonite (MMT). The aim of this work was to test which of the V(V) oxide species over the catalyst surface can be identified by VMP. V2O5 was detected by VMP irrespective of its crystallinity at concentrations close to the detection limit of crystalline V2O5 by XRD. VMP selectively identified poly-vanadates prevailing on TiO2 supports and oligomeric vanadate species prevailing on alumina at medium V-loadings. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2010
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