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An in Situ FT-IR Study of CO Hydrogenation over Cerium Oxide

✍ Scribed by C. Li; K. Domen; K. Maruya; T. Onishi

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
478 KB
Volume
141
Category
Article
ISSN
0021-9517

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✦ Synopsis

The (\mathrm{CO}) hydrogenation over cerium oxide was studied by using a closed circulating reaction system and in situ Fourier transform infrared spectroscopy (FT-IR) at 300-673 K. The major products of the (\mathrm{CO}-\mathrm{H}{2}) reaction over cerium oxide were found to be olefins (\left(\mathrm{C}{2}-\mathrm{C}{4}^{\prime}\right), \mathrm{CH}{4}, \mathrm{CO}{2}), and (\mathrm{H}{2} \mathrm{O}). IR bands due to surface oxygen-containing species such as formate, dioxymethylene. methoxy, and formyl were always detected during the (\mathrm{CO}-\mathrm{H}_{2}) reaction at (300-573 \mathrm{~K}) over cerium oxide. No direct relationship between the surface oxygen-containing species and the production of hydrocarbons were found. The mechanism of (\mathrm{CO}) hydrogenation on cerium oxide involving the surface redox was discussed. 1993 Academic Press. Inc.

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