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FTIR study of the photoinduced dissociation of CO2 on titania-supported noble metals

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Abstract

The effect of illumination on the activation and dissociation of CO2 was investigated at 190 and 300 K on titania-supported noble metals by means of Fourier transform infrared spectroscopy. The photoinduced dissociation of CO2 (through the formation of \(CO_{2(a)}^ - )\) resulting in CO(a) occurred on Pt/TiO2, Rh/TiO2 and Ir/TiO2; no CO(a) formation, however, was observed on Pd/TiO2 and Ru/TiO2. It is assumed that the CO2 on supported noble metals is bonded to the surface with both C (linked to a noble metal atom) and one of the O atoms (linked to the oxygen vacancy of the supports), and an extended charge transfer induced by illumination leads to the cleavage of a C–O bond.

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  1. Reaction Kinetics Research Group of the Hungarian Academy of Sciences, PO Box 168, H-6701, Szeged, Hungary

    J. Raskó

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  1. J. Raskó
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Raskó, J. FTIR study of the photoinduced dissociation of CO2 on titania-supported noble metals. Catalysis Letters 56, 11–15 (1998). https://doi.org/10.1023/A:1019072021006

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  • DOI: https://doi.org/10.1023/A:1019072021006

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