Journal of the Chemical Society - Faraday Transactions p. 3273 - 3279 (1996)
Update date:2022-08-17
Topics:
Zeyss, Sabine
Wendt, Gerhard
Hallmeier, Karl-Heinz
Szargan, Ruediger
Lippold, Gerd
The effect of zirconium phosphate on the catalytic, textural and structural properties of (VO)2P2O7 catalysts has been studied. Catalysts with different P/V and Zr/V ratios were prepared using different preparation methods and characterized by thermoanalytical and texture measurements, X-ray diffraction (XRD), potentiometric titration, FTIR, X-ray absorption [X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS)] and laser Raman spectroscopy. The n-butane conversion and the maxima of maleic anhydride (MA) yield shift to lower reaction temperatures on modification of (VO)2P2O7 with zirconium phosphate. There is no correlation between catalytic and textural properties of the modified catalysts. The zirconium phosphate modification causes a partial amorphization of the (VO)2P2O7 catalysts and leads to an enhancement of the VOPO4 microdomains (α1-, β-VOPO4 and amorphous VOPO4).
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