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Supported two- and three-dimensional vanadium oxide species on the surface of β-SiC

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Abstract

A series of supported two- and three-dimensional vanadium oxide surface species on β-SiC with various V coverages are prepared via incipient wetness impregnation and characterized by a variety of ex and in situ techniques. The oxidative dehydrogenation of propane (ODHP) is also used as a probe reaction to complementarily distinguish between two- and three-dimensional VOx surface species. Herein, we show that treating pristine β-SiC with oxygen transforms the existing amorphous SiOxCy surface layer into a more SiO2-type layer, though with a negligible formation of Si–OH sites, which initially were expected to be the anchor sites for VOx species. In its place, the C–OH functional groups identified by X-ray photoelectron spectroscopy (XPS) act as anchor sites for the VOx species during the impregnation process, and are consumed as a function of V coverage. Our experimental observations all corroborate the formation of two- and three-dimensional VOx species on the surface of β-SiC.

Graphical abstract: Supported two- and three-dimensional vanadium oxide species on the surface of β-SiC

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Publication details

The article was received on 23 May 2017, accepted on 11 Jul 2017 and first published on 25 Jul 2017


Article type: Paper
DOI: 10.1039/C7CY01036B
Citation: Catal. Sci. Technol., 2017, Advance Article
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    Supported two- and three-dimensional vanadium oxide species on the surface of β-SiC

    C. A. Carrero, S. P. Burt, F. Huang, J. M. Venegas, A. M. Love, P. Mueller, H. Zhu, J. T. Grant, R. Mathison, M. P. Hanraham, A. Rossini, M. Ball, J. Dumesic and I. Hermans, Catal. Sci. Technol., 2017, Advance Article , DOI: 10.1039/C7CY01036B

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