Infrared spectroscopic study on the reaction mechanism of CO hydrogenation over Pd/CeO2

Infrared spectroscopic study on the reaction mechanism of CO hydrogenation over Pd/CeO2 In situ infrared spectroscopy was applied to elucidate the reaction mechanism of CO hydrogenation over Pd/CeO2. Instead of direct dissociation of CO, a new reaction pathway is proposed for methane formation, involving geminal dicarbonyl intermediates and (HCO)2(a) intermediates, which may be located on the surface of Pd covered with thin layers of reduced ceria (SMSI effect). Transformation of methane formation sites into methanol formation ones by the oxidation with water vapor formed during the CO−H2 reaction is proposed, which may be located on the Pd (111) planes adjacent to ceria support. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Infrared spectroscopic study on the reaction mechanism of CO hydrogenation over Pd/CeO2

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Publisher
Springer Netherlands
Copyright
Copyright © 2006 by Springer
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1163/156856706777346444
Publisher site
See Article on Publisher Site

Abstract

In situ infrared spectroscopy was applied to elucidate the reaction mechanism of CO hydrogenation over Pd/CeO2. Instead of direct dissociation of CO, a new reaction pathway is proposed for methane formation, involving geminal dicarbonyl intermediates and (HCO)2(a) intermediates, which may be located on the surface of Pd covered with thin layers of reduced ceria (SMSI effect). Transformation of methane formation sites into methanol formation ones by the oxidation with water vapor formed during the CO−H2 reaction is proposed, which may be located on the Pd (111) planes adjacent to ceria support.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Apr 15, 2009

References

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