The nature of oxygen species responsible for propene oxidation over V-Mo and V-Sn oxides.
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概要
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The rate of oxidation of C<SUB>3</SUB>H<SUB>6</SUB> has been investigated over V–Mo oxides using <SUP>18</SUP>O<SUB>2</SUB>(99%) tracer. The extent of participation of lattice oxygen in the oxidation increases with increasing MoO<SUB>3</SUB> content, showing a maximum at V–Mo (33 mol% of MoO<SUB>3</SUB>) oxide. The rate of oxidation of C<SUB>3</SUB>H<SUB>6</SUB> varies parallel to the extent of participation of lattice oxygen. A marked dependence of the rate of oxidation upon oxygen pressure observed with V–Mo(33) oxide is attributed to its high reducibility. Similar experiments have been carried out with V–Sn (94 mol% of SnO<SUB>2</SUB>) oxide. The rate of reduction of the oxide with C<SUB>3</SUB>H<SUB>6</SUB> is about ten times smaller than that of the corresponding catalytic oxidation of C<SUB>3</SUB>H<SUB>6</SUB>, suggesting the participation of adsorbed oxygen in the oxidation. The results of <SUP>18</SUP>O tracer experiments show participation of lattice oxygen in the oxidation. A mechanism which explains such conflicting results has been proposed.
- 公益社団法人 日本化学会の論文
著者
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Ono Takehiko
Department Of Applied Chemistry Graduate School Of Engineering Osaka Prefecture University
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Kubokawa Yutaka
Department of Applied Chemistry College of Engineering University of Osaka Prefecture
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