Catalytic activity of MoO3 and V2O5 highly dispersed on TiO2 for oxidation reactions.
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概要
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The structure of Mo–Ti oxide catalysts has been investigated by using IR and XRD techniques. At a low Mo content, MoO<SUB>3</SUB> is highly dispersed on TiO<SUB>2</SUB>, an amorphous phase being formed. Simultaneously, a shift of the Mo=O band from 995 cm<SUP>－1</SUP> to 950 and 905 cm<SUP>－1</SUP> takes place. The maximum rate of the oxidation of C<SUB>2</SUB>H<SUB>5</SUB>OH and C<SUB>3</SUB>H<SUB>6</SUB> over Mo–Ti-6(atom% of Mo) is attributable to the weakening of the Mo=O bond. The <SUP>18</SUP>O tracer and kinetic studies of the oxidation of C<SUB>3</SUB>H<SUB>6</SUB> over Mo–Ti and V–Ti oxides suggest that a redox mechanism is applicable, the rate constants of reduction and reoxidation step being determined. The promoter action of TiO<SUB>2</SUB> support is attributed mainly to the increase in the rate of reduction step.
著者
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Ono Takehiko
Department Of Applied Chemistry Graduate School Of Engineering Osaka Prefecture University
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Miyata Hisashi
Department Of Applied Chemistry University Of Osaka Prefecture
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Nakagawa Yoshiro
Department Of Electrical Engineering Faculty Of Engineering Osaka City University
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Kubokawa Yutaka
Department of Applied Chemistry College of Engineering University of Osaka Prefecture
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