Methanol decomposition on single-crystal Cu₂O

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TR Number

Date

1990-05-01

Journal Title

Journal ISSN

Volume Title

Publisher

American Institute of Physics

Abstract

CH₃OD decomposition has been studied over the stoichiometric, nonpolar (111) and polar, copper_terminated (100) surfaces of Cu₂O. Thermal desorption studies for monolayer coverages of methanol at 90 K show similar conversions, but the product distributions vary significantly, indicating a structure sensitive reaction. The (111) surface shows a maximum selectivity for complete oxidative dehydrogenation to CO, while the (100) surface shows a maximum selectivity for partial dehydrogenation to CH₂O. Thermal desorptionspectroscopy (TDS) and x-ray photoelectron spectroscopy (XPS) data are consistent with a decomposition pathway which proceeds through a methoxy intermediate for both surfaces. Possible origins for the structure sensitivity are discussed.

Description

Keywords

Materials science, coatings & films, Physics, applied

Citation

Cox, D. F.; Schulz, K. H., "Methanol decomposition on single-crystal cu2o," J. Vac. Sci. Technol. A 8, 2599 (1990); http://dx.doi.org/10.1116/1.576678