Effect of nitridation on the electronic environment of vanadium in VAlO(N) powder catalysts, used for the ammoxidation of propane
(2006) Catalysis Today — Vol. 118, n° 3-4, p. 344-352 (2006)
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- Abstract
- VAlO(N) oxynitrides are promising novel catalysts for the ammoxidation of propane to acrylonitrile. These catalysts are obtained after nitridation of a VAlO oxide precursor in NH3 or during the reaction in a NH3/C3H8/O-2 mixture. The local structure around the vanadium atoms in the oxide precursor and in several catalysts that have been used in catalytic tests is studied by X-ray absorption spectroscopy (XAS). The nitridation in NH3 was followed with in situ XAS. The oxide precursors have tetrahedral co-ordinated vanadium, while after full nitridation octahedrons are found and a small decrease in vanadium oxidation state occurs. The catalysts used in the ammoxidation reaction consist of a mixture of these tetrahedrons and octahedrons. (c) 2006 Elsevier B.V. All rights reserved.
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Citations
Silversmit, G., Poelman, H., De Gryse, R., Bras, W., Nikitenko, S., Florea, M., Grange, P., & Delsarte, S. (2006). Effect of nitridation on the electronic environment of vanadium in VAlO(N) powder catalysts, used for the ammoxidation of propane. Catalysis Today, 118(3-4), 344-352. https://doi.org/10.1016/j.cattod.2006.07.013 (Original work published 2006)