Infrared spectroscopy study of adsorption and coadsorption of carbon monoxide and hydrogen on Ru/Al203 |
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Authors: | Silvia Zh. Todorova Georgi B. Kadinov |
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Affiliation: | (1) National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, 523 Gongye Road, Fuzhou, Fujian, 35002, P.R. China; |
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Abstract: | IR spectroscopy was used to study CO adsorption and coadsorption with H2 on 5% Ru/Al2O3. By variation of sample pretreatment, CO pressures, contact time and temperature several surface species were identified: mono– and multicarbonyl species formed with ruthenium in different oxidation state and on various sites of the catalyst surface. During CO and H2 coadsorption and interaction, a new band at 2030 cm–1 was registered. It was assigned to a 'hydrocarbonyl' species on the metal particles. Thermal stability of some CO species was studied. Most stable and least reactive species was found to be a multicarbonyl giving rise to bands at 1980 and 2060 cm–1. |
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Keywords: | CO ADSORPTION CO HYDROGENATION RUTHENIUM CATALYSTS IR SPECTROSCOPY HYDROCARBONYL SPECIES |
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