In situ diffuse reflectance FT-IR studies of TiO2 and Pt/TiO2 in photo-oxidation of benzene and ethylene

In situ diffuse reflectance FT-IR studies of TiO2 and Pt/TiO2 in photo-oxidation of benzene and... In situ diffuse reflectance FT-IR measurements were carried out to investigate the formation and decomposition behavior of by-product compounds on TiO2 and Pt/TiO2 catalyst surfaces during the photo-oxidation of benzene and ethylene. In the benzene photo-oxidation ([benzene]=100 ppm) without water vapor, TiO2 catalyst was readily covered with oxygen-containing by-product compounds, which were decomposed by photoirradiation in the presence of water vapor ([H2O]=0.17%) with an induction period. Pt deposition slightly increased the rate for their decomposition. In the ethylene photo-oxidation ([ethylene]=400 ppm) without water vapor, oxygen-containing by-product compounds were also formed, which were readily decomposed by photoirradiation in the presence of water vapor without induction period. Pt deposition on TiO2 surface had no significant effect on the photo-oxidation processes. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

In situ diffuse reflectance FT-IR studies of TiO2 and Pt/TiO2 in photo-oxidation of benzene and ethylene

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Publisher
Springer Netherlands
Copyright
Copyright © 2008 by Springer
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1163/156856708784795536
Publisher site
See Article on Publisher Site

Abstract

In situ diffuse reflectance FT-IR measurements were carried out to investigate the formation and decomposition behavior of by-product compounds on TiO2 and Pt/TiO2 catalyst surfaces during the photo-oxidation of benzene and ethylene. In the benzene photo-oxidation ([benzene]=100 ppm) without water vapor, TiO2 catalyst was readily covered with oxygen-containing by-product compounds, which were decomposed by photoirradiation in the presence of water vapor ([H2O]=0.17%) with an induction period. Pt deposition slightly increased the rate for their decomposition. In the ethylene photo-oxidation ([ethylene]=400 ppm) without water vapor, oxygen-containing by-product compounds were also formed, which were readily decomposed by photoirradiation in the presence of water vapor without induction period. Pt deposition on TiO2 surface had no significant effect on the photo-oxidation processes.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Apr 15, 2009

References

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