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Haffad, D.; Chambellan, A.; Lavalley, Jean‐Claude

doi:10.1023/a:1019064930150

Cited by 41 publications

(27 citation statements)

References 28 publications

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“…The ceria, however, appears to promote the dehydration reaction. In a study of isopropanol dehydrogenation on simple metal oxides [11], it was found that Ce 2 O 3 gave a higher dehydration activity than CeO 2 during isopropanol conversion in a hydrogen rich atmosphere. Acidic sites catalyze the dehydration, but the Ce 2 O 3 was found to be less acidic than CeO 2 .…”

Section: Resultsmentioning

confidence: 99%

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Highly active Cu-based catalysts on carbon nanofibers for isopropanol dehydrogenation

et al. 2005

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Section: Resultsmentioning

confidence: 99%

“…Acidic sites catalyze the dehydration, but the Ce 2 O 3 was found to be less acidic than CeO 2 . Ceria was, therefore, believed to exhibit a redoxability contributing to the dehydration [11].…”

Section: Resultsmentioning

confidence: 99%

Highly active Cu-based catalysts on carbon nanofibers for isopropanol dehydrogenation

et al. 2005

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“…Basic sites may interact with Cu sites via migration of hydrogen atoms. [165] The conversion of cyclohexanol [39,142,166,167] or of 2-propanol [168][169][170][171][172][173][174][175] allows the characterization of the acid-base surface properties of the oxides. The dehydration of alcohol leading to alkene would be catalyzed by the acid centers, whereas its dehydrogenation leading to ketone would be catalyzed both by acid and basic sites.…”

Section: Dehydrogenation Of Alcoholsmentioning

confidence: 99%

“…[168] Under air, ceria is more active and the selectivity in acetone is more important than under helium or dihydrogen. [169] The selectivity of Cu/CeO 2 /CNF (CNF: carbon nanofiber) was dependent on the fraction of CeO 2 and on the temperature. High activity and selectivity were achieved with the Cu 12 Ce 5 /CNF catalyst.…”

Section: Dehydrogenation Of Alcoholsmentioning

confidence: 99%

Ceria‐Based Solid Catalysts for Organic Chemistry

Vivier¹,

Duprez²

2010

ChemSusChem

352

244

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Ceria has been the subject of thorough investigations, mainly because of its use as an active component of catalytic converters for the treatment of exhaust gases. However, ceria‐based catalysts have also been developed for different applications in organic chemistry. The redox and acid–base properties of ceria, either alone or in the presence of transition metals, are important parameters that allow to activate complex organic molecules and to selectively orient their transformation. Pure ceria is used in several organic reactions, such as the dehydration of alcohols, the alkylation of aromatic compounds, ketone formation, and aldolization, and in redox reactions. Ceria‐supported metal catalysts allow the hydrogenation of many unsaturated compounds. They can also be used for coupling or ring‐opening reactions. Cerium atoms can be added as dopants to catalytic system or impregnated onto zeolites and mesoporous catalyst materials to improve their performances. This Review demonstrates that the exceptional surface (and sometimes bulk) properties of ceria make cerium‐based catalysts very effective for a broad range of organic reactions.

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“…The result is an increase of the surface area, of the porosity, and of the number of the acid sites with respect to the parent clays, depending on the intensity of the treatment. The acid-activation procedure of natural bentonites is known to involve the treatment of the uncalcined clay with mineral acids at 90 • C for several hours, leading to aluminum leaching (and to a lesser extent silicon leaching) from the TOT layers [8,[13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%