Reactions of Acetaldehyde on CeO2 and CeO2-Supported Catalysts

Idriss, Hicham; Diagne, Cheikh Tidiane; Hindermann, J. P.; Kiennemann, A.; Barteau, Mark A.

doi:10.1006/jcat.1995.1205

Cited by 228 publications

(217 citation statements)

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“…CeO 2 was chosen as support because its reducibility and basicity favor aldolization reactions. [224,225] Three CÀC bond formation reactions from acetaldehyde were observed: aldolization to crotonaldehyde and crotyl alcohol (more prominent on CeO 2 alone), ketonization to acetone, and reductive coupling to form butenes and butadiene. [224] 4-Methyl-2-pentanone or methylisobutylketone (MIBK) was synthesized from 2-propanol in one pot on bifonctional metal/ acid-base catalysts.…”

Section: Aldol Condensationmentioning

confidence: 99%

“…[224,225] Three CÀC bond formation reactions from acetaldehyde were observed: aldolization to crotonaldehyde and crotyl alcohol (more prominent on CeO 2 alone), ketonization to acetone, and reductive coupling to form butenes and butadiene. [224] 4-Methyl-2-pentanone or methylisobutylketone (MIBK) was synthesized from 2-propanol in one pot on bifonctional metal/ acid-base catalysts. The synthesis of MIBK from 2-propanol involves the dehydrogenation of 2-propanol to acetone which is converted to mesityl oxide (3, Scheme 19) via an aldol condensation reaction and consecutive dehydration of the aldol intermediate, diacetone alcohol (2, Scheme 19).…”

Section: Aldol Condensationmentioning

confidence: 99%

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Ceria‐Based Solid Catalysts for Organic Chemistry

Vivier¹,

Duprez²

2010

ChemSusChem

348

236

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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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Section: Aldol Condensationmentioning

confidence: 99%

Section: Aldol Condensationmentioning

confidence: 99%

Ceria‐Based Solid Catalysts for Organic Chemistry

Vivier¹,

Duprez²

2010

ChemSusChem

348

236

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“…On a prereduced CeO 2 surface, the desorption of unreacted ACA occurs at a marginally higher temperature (390 K), but is accompanied by a significant amount of ethanol production. [19] This can be attributed to the more basic surface of reduced CeO 2 , whereas for the current pre-oxidized CeO 2 surface, only subtle ethanol desorption occurred with ACA desorption. The ACA desorption coincides with a significant level of CO and CO 2 desorption, which was absent in the case of reduced CeO 2 .…”

Section: Tio 2 and Cu/tiomentioning

confidence: 90%

“…The ACA desorption coincides with a significant level of CO and CO 2 desorption, which was absent in the case of reduced CeO 2 . [19] Assignment of the second ACA desorption peak (420 K) is unclear and may be due to strongly adsorbed ACA.…”

Section: Tio 2 and Cu/tiomentioning

confidence: 99%

Probing Surface Properties and Reaction Intermediates During Heterogeneous Catalytic Oxidation of Acetaldehyde

Kydd¹,

Teoh²,

Scott³

et al. 2009

ChemCatChem

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The influence of Cu on various metal oxide supports was investigated for the catalytic oxidation of acetaldehyde (ACA). The activity of the catalysts towards ACA conversion and the CO2 yield decrease in the order: Cu/CeO2>Cu/TiO2≈Cu/ZrO2> Cu/Al2O3>Cu/SiO2. Spontaneous adsorptive conversion of ACA to surface carboxylates, such as bridging and bidentate acetates, was detected over the basic supports CeO2, TiO2, and ZrO2. Detailed temperature‐programmed studies found the high activity of Cu/CeO2 to stem mainly from the intrinsically high activity of the CeO2 support. In contrast, similar studies on Cu/TiO2 demonstrated the activity improvements imparted by Cu were predominantly additive. Despite the difference in origin of ACA oxidation activity over Cu/CeO2 and Cu/TiO2, the overall concerted effects of basicity‐induced carboxylate formation and availability of surface oxygen were thought to be overriding factors crucial in the overall catalytic reactivity.

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“…Versatile synthesis strategies have been developed for obtaining catalysts with high performance during BESR. Incipient wetness impregnation (IWI) [88][89][90][91], wet impregnation [84,92,93], sol-gel (SG) [94,95], and coprecipitation (CP) [63,64,86,87] are the most commonly utilized methods, each of which has its own advantages and disadvantages. Impregnation is the most convenient method to be scaled up, for manufacturing.…”

Section: Catalyst Optimization Strategiesmentioning

confidence: 99%

Catalytic Hydrogen Production from Bioethanol

Song

2017

Hydrogen Production Technologies

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Reactions of Acetaldehyde on CeO2 and CeO2-Supported Catalysts

Cited by 228 publications

References 0 publications

Ceria‐Based Solid Catalysts for Organic Chemistry

Ceria‐Based Solid Catalysts for Organic Chemistry

Probing Surface Properties and Reaction Intermediates During Heterogeneous Catalytic Oxidation of Acetaldehyde

Catalytic Hydrogen Production from Bioethanol

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