The Role of Oxygen Vacancies in Methanol Reaction on Oxidized Mo(110)

The reaction of methanol on oxidized Mo(110) surfaces is investigated using temperature-programmed reaction and a combination of high-resolution electron energy loss and infrared reflectance−absorbance spectroscopies. By varying conditions for preparation of surface oxide layers, we show that change...

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Bibliographic Details
Published in:The journal of physical chemistry. B 1998-06, Vol.102 (26), p.5178-5181
Main Authors: Queeney, K. T, Friend, C. M
Format: Article
Language:English
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Summary:The reaction of methanol on oxidized Mo(110) surfaces is investigated using temperature-programmed reaction and a combination of high-resolution electron energy loss and infrared reflectance−absorbance spectroscopies. By varying conditions for preparation of surface oxide layers, we show that changes in reactivity in the presence of MoO species are in fact due to changes in the overall surface oxygen content, rather than to special reactivity at terminal sites, as was previously proposed. On the basis of these investigations, we propose that methanol reaction is promoted at open high-coordination sites. Infrared spectroscopy demonstrates that oxygen from this reaction is deposited in high-coordination sites only, even in the presence of MoO species, consistent with the reaction pathway for methanol on less highly oxidized Mo(110) surfaces.
ISSN:1520-6106
1520-5207
DOI:10.1021/jp9812886