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2005
Catalysts
H 2000
32- 018
Synthesis and Characterization of Vanadyl Hydrogen Phosphite Hydrate. —
VOHPO3·1.5H2O is synthesized by solvothermal reaction of V2O5 and H 3PO3 in
H2O-free PrOH (autoclave, 150 °C, 24 h). In the presence of water, VOHPO3·H2O is
the unique product. The samples are characterized by TGA, powder XRD, and IR and
Raman spectroscopy. On heating the samples in flowing N2 at >700 °C they transform
into VPO4 via an internal oxidation—reduction process. A catalyst derived from
VOHPO3·H2O and activated in situ under the reaction conditions shows higher intrinsic
activity for the selective oxidation of n-butane to maleic anhydride than that derived
from VOHPO3·1.5H2O. — (DONG, W.-S.; BARTLEY, J. K.; SONG, N.-X.;
HUTCHINGS*, G. J.; Chem. Mater. 17 (2005) 10, 2757-2764; Sch. Chem., Cardiff
Univ., Cardiff CF1 3TB, UK; Eng.) — W. Pewestorf
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