Mn-Ti mixed oxides with composition Ti(1-x)Mn(x)O(y) (x =0, 0.1, 0.2, 0.5; 0.8, 0.9 and 1) have been prepared. A Mn-TiO(2) monolayer type sample has also been prepared by impregnation, for comparison. Manganese is found to speed up the anatase-to-rutile phase transition,more clearly in the impregnated sample, while titanium tends to slightly hinder the thermodynamically reversible hausmannite-to-bixbyite phase transition upon cooling; The catalytic activity of all samples in propene oxidation decreases by increasing the Ti content: Conversely, the catalytic activity in propane oxidation shows a maximum at intermediate composition.
A study of Mn-Ti oxide powders and their behaviour in propane oxidation catalysis
BUSCA, GUIDO
1998-01-01
Abstract
Mn-Ti mixed oxides with composition Ti(1-x)Mn(x)O(y) (x =0, 0.1, 0.2, 0.5; 0.8, 0.9 and 1) have been prepared. A Mn-TiO(2) monolayer type sample has also been prepared by impregnation, for comparison. Manganese is found to speed up the anatase-to-rutile phase transition,more clearly in the impregnated sample, while titanium tends to slightly hinder the thermodynamically reversible hausmannite-to-bixbyite phase transition upon cooling; The catalytic activity of all samples in propene oxidation decreases by increasing the Ti content: Conversely, the catalytic activity in propane oxidation shows a maximum at intermediate composition.
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