Oxidation and reduction of MoO2-MoO3 studied by infrared emission spectroscopy.
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概要
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A sample preparation technique was developed for the study of infrared emission spectroscopy. The emission spectrum of MoO<SUB>3</SUB> showed peaks at 987 and 925 cm<SUP>−1</SUP> in the temperature range of 185 through 505 °C. Peak intensities were proportional to the sample weight. The background intensity in the emission spectrum was measured at 1050 cm<SUP>−1</SUP> and it was also proportional to the sample weight. In order to apply emission spectroscopy to the study of reaction kinetics, the reduction of MoO<SUB>3</SUB> by H<SUB>2</SUB> and the oxidation of MoO<SUB>2</SUB> by O<SUB>2</SUB> were chosen as model reactions. These reactions were studied at 425 to 485 °C and the activation energy for the reduction of MoO<SUB>3</SUB> was 43 kcal/mol and that for the oxidation of MoO<SUB>2</SUB> was 38 kcal/mol. The activation energy for the formation of the terminal Mo=O bond was, however, 71.2 kcal/mol.
- 公益社団法人 日本化学会の論文
著者
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Ueno Akifumi
National Chemical Laboratory for Industry
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Bennett Carroll
Department of Chemical Engineering, University of Connecticut
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