Publication detail

V(V) species in supported catalysts: Analysis and performance in oxidative dehydrogenation of ethane

Authors: Grygar T. | Čapek Libor | Adam Jiří | Machovic Vladimír

Year: 2009

Type of publication: článek v odborném periodiku

Name of source: Journal of Electroanalytical Chemistry

Publisher name: Elsevier Science SA

Place: Lausanne

Page from-to: 127-136

Titles:

Language	Name	Abstract	Keywords
cze	V(V) centra v nanesených katalyzátorech: analýza center a jejich efektivita v ODH ethanu	Voltametrie, UV-Vis, XRD a Raman spektroskopie byla využita k identifikaci V(V) center ve vanadových katalyzátorech. Cílem práce byla studie, které částice mohou být detekované pomocí voltametrie.	vanadové katalyzátory;voltametrie;UV-Vis;strukturní analýza
eng	V(V) species in supported catalysts: Analysis and performance in oxidative dehydrogenation of ethane	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.	vanadium-oxide catalysts;voltammetry;UV-Vis;structure analysis

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