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Reactivity of methanol over copper supported on well-shaped CeO2: A TPD-DRIFTS study

Abstract

TPD-DRIFTS experiments upon methanol adsorption have been performed for the first time over copper (5 wt.%) supported on well-shaped ceria (polyhedra, rods and cubes). Support morphology influences the type of methoxy and formate adsorbed species; in polyhedra 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 H2 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 differences in the desorption profiles and reactivity of the adsorbed species over the three copper-ceria catalysts.

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Publication details

The article was received on 16 May 2017, accepted on 08 Aug 2017 and first published on 08 Aug 2017


Article type: Paper
DOI: 10.1039/C7CY00984D
Citation: Catal. Sci. Technol., 2017, Accepted Manuscript
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    Reactivity of methanol over copper supported on well-shaped CeO2: A TPD-DRIFTS study

    D. G. Araiza, A. L. Gómez-Cortés and G. Díaz, Catal. Sci. Technol., 2017, Accepted Manuscript , DOI: 10.1039/C7CY00984D

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