Carbon Dioxide Adsorption on V2O3(0001)

The adsorption of carbon dioxide on epitaxially grown V 2 O 3 layers on Au(111) has been studied with thermal desorption and infrared absorption spectroscopy. It is shown that the as-grown grown oxide layer does not react with carbon dioxide; the molecule binds weakly to the surface, stays intact an...

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Bibliographic Details
Published in:Topics in catalysis 2017-05, Vol.60 (6-7), p.413-419
Main Authors: Haija, M. Abu, Romanyshyn, Y., Uhl, A., Kuhlenbeck, H., Freund, H.-J.
Format: Article
Language:English
Subjects:
Adsorption
Annealing
Carbon dioxide
Carbon monoxide
Catalysis
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Decomposition
Desorption
Epitaxial growth
Industrial Chemistry/Chemical Engineering
Infrared absorption
Infrared spectroscopy
Original Paper
Oxidation
Oxygen atoms
Pharmacy
Physical Chemistry
Spectroscopic analysis
Surface chemistry
Vanadium oxides
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Summary:The adsorption of carbon dioxide on epitaxially grown V 2 O 3 layers on Au(111) has been studied with thermal desorption and infrared absorption spectroscopy. It is shown that the as-grown grown oxide layer does not react with carbon dioxide; the molecule binds weakly to the surface, stays intact and desorbs below 200 K. If the oxide is weakly reduced such that part or all of the oxygen atoms of the surface vanadyl layer is removed, then a surface carboxylate, i.e. CO 2 - bound to surface vanadium is formed. Part of the CO 2 derived species decompose into O+CO upon annealing, with the oxygen atoms re-oxidizing the reduced oxide surface.
ISSN:1022-5528
1572-9028
DOI:10.1007/s11244-017-0810-4