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CATALYTIC PROPERTIES OF THERMALLY DECOMPOSED 12-MOLYBDOPHOSPHORIC AND 10-MOLYBDO-2-
VANADOPHOSPHORIC ACIDS
Korean Journal of Chemical Engineering, January 1991, 8(1), 33-38(6), 10.1007/BF02697695
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Abstract
Changes in the structural and surface properties of 12-molybdophosphoric(abbreviated as PMo12) and 10-molybdo-2-vanadophosphoric(abbreviated as PMo10V2) acids as they are decomposed at high temperatures have been studied by IR, XRD, XPS, and TPD experiments. PMo12 simply decomposes into MoO3 by heat-treatment at 580℃, but PMo10V2 yields a mixed oxide whose properties are different from those of either MoO3 or V2O5. After the thermal decomposition, PMo12 loses the initial acidic and redox properties almost completely but PMo10V2 retains some extent of the redox capability that is larger than that of MoO3 and V2O5. The redox capability of the mixed oxide obtained by PMo10V2 decomposition is correlated with its catalytic activity in oxidation processes.
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