Ammoxidation of toluene on vanadyl polyphosphates-VO(PO3)2, 1. synthesis and characterization of the parent samples |
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| Authors: | Fouzia K Hannour Andreas Martin Angelika Brückner Gert-Ulrich Wolf and Bernhard Lücke |
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| Institution: | (1) Institut für Angewandte Chemie Berlin-Adlershof e.V., Rudower Chaussee 5, D-12489 Berlin, Germany;(2) Present address: Department of Chemical Engineering, University of Technology of Compiégne, France |
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| Abstract: | Vanadyl polyphosphates with a P/V ratio=2 (crystalline α-VO(PO3)2 and β-VO(PO3)2 as well as amorphous VO(PO3)2) were synthesized, starting from usually prepared precursor VO(H2PO4)2 but pursuing new methods using V2O5/H3PO4 as well as VOHPO4·1/2 H2O/H3PO4, too. The products were characterized by chemical analysis and X-ray diffractometry.In situ ESR spectroscopy was used as a tool to predict their catalytic activity in the ammoxidation reaction. |
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| Keywords: | Vanadyl polyphosphates phase transformation XRD in situ ESR spectroscopy |
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