Methanol oxidation over vanadium-containing model oxide catalysts. Influence of charge-transfer effects on selectivity

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Abstract
Model vanadium-containing catalysts [α-Al2–xVxO3(x= 0–0.2), TixV1O2–x(x= 0–0.2) and SnxV1–xO2(x= 0–0.2)] have been studied to discover the extent to which conductivity or electron-exchange effects are important in determining catalyst selectivity in the oxidation of methanol. By cross-comparison of the catalytic behaviour and solid-state data for the three catalyst systems it is concluded that the high selectivity to partial oxidation products is correlated with relatively facile electron exchange between active-site cations. The host lattice is shown to have an important role in that the “electronic isolation” of the active sub-lattice seems to be important.

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