2003 Catalysts

CatalystsH 2000 High Temperature Preparation of Vanadium Phosphate Catalysts Using Water as

Solvent. — High surface area catalysts comprising (VO)2P2O7 and αII-VOPO4 are pre-pared from aqueous mixtures of V2O5, H3PO4, and H3PO3, or V2O5, H4P2O7, and H3PO3 (autoclave, 145 °C, 72 h). The samples are characterized by powder XRD, BET surface area measurements, Raman spectroscopy, TGA, electron microscopy, and 31P NMR. They exhibit catalytic activities and selectivities comparable to vanadium phosphate catalysts prepared using non-aqueous solvents. It is concluded that non-aqueous sol-vents and reducing agents are not required to produce highly active catalysts and, with further optimization, the use of aqueous methodology is expected to yield significantly improved catalysts. — (LOPEZ-SANCHEZ, J. A.; GRIESEL, L.; BARTLEY, J. K.; WELLS, R. P. K.; LISKOWSKI, A.; SU, D.; SCHLOEGL, R.; VOLTA, J.-C.; HUTCHINGS*, G. J.; Phys. Chem. Chem. Phys. 5 (2003) 16, 3525-3533; Dep. Chem., Cardiff Univ., Cardiff CF1 3TB, UK; Eng.) — W. Pewestorf

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