NDLI: X-ray photoelectron spectroscopic study of a Cu–Al–O catalyst under H<sub>2</sub> or CO atmospheres

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Journal of the Chemical Society, Faraday Transactions Vol - 89 Issue - 7

Journal of the Chemical Society, Faraday Transactions Vol - 89 Issue - 6

Journal of the Chemical Society, Faraday Transactions Vol - 89 Issue - 5

Journal of the Chemical Society, Faraday Transactions Vol - 89 Issue - 4

Journal of the Chemical Society, Faraday Transactions Vol - 89 Issue - 3

X-ray photoelectron spectroscopic study of a Cu–Al–O catalyst under H₂ or CO atmospheres

Content Provider	Royal Society of Chemistry (RSC)
Author	Aboukaïs, Antoine Bechara, Rafeh Bonnelle, Jean-Pierre
Copyright Year	1993
Abstract	The surface changes of a Cu–Al–O catalyst under H2 or CO atmospheres have been followed by X-ray photoelectron spectroscopy (XPS). In both cases, the progressive reduction of copper(II) species in the octahedral and tetrahedral sites to lower oxidation states for temperatures above 250 °C is observed. When the catalyst is reduced by H2, the main Cu 2p3/2 peak is resolved into its components (Cu2+, Cu+ in tetrahedral and octahedral sites, Cu0) and the proportion of the different copper species has been calculated. The concentration of Cu+ species in the octahedral environment is maximum after reducing the catalyst at 300 °C, which corresponds to better catalytic activity in the hydrogenation of dienes. In case of Cu–Al–O treated by CO where the catalyst surface contained copper species with oxidation states lower than +2, the adsorption of carbon monoxide in a molecular state seems more probable than dissociation which leads to carbidic species.
Starting Page	1257
Ending Page	1262
Page Count	6
File Format	PDF
ISSN	09565000
Volume Number	89
Issue Number	8
Journal	Journal of the Chemical Society, Faraday Transactions
DOI	10.1039/FT9938901257
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Cu Adsorption Photoemission spectroscopy Carbon monoxide Dissociative Copper Hydrogenation X-ray photoelectron spectroscopy
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry

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