Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 7, Issue 22, Pages 5224-5235Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cy00984d
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Funding
- CONACyT [308329]
- [CONACyT-176509]
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TPD-DRIFTS experiments upon methanol adsorption over copper (5 wt%) supported on well-shaped ceria (polyhedra, rods and cubes) have been performed for the first time. Support morphology influences the type of methoxy and formate adsorbed species; in polyhedron and rod-shaped catalysts, linear methoxy and formate are the predominant species, while in cube-shaped catalyst, bridged species dominate. In the catalysts, desorption of H-2 and CO2 increases significantly indicating that besides dehydrogenation of adsorbed methoxy, oxidation of adsorbed formate species is taking place. Heterogeneity of surface sites (copper, ceria and copper/ceria interface), surface defects and acid-base properties may account for the differences in the desorption profiles and reactivities of the adsorbed species over the three copper-ceria catalysts.
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