Adsorption and surface reactions of acetaldehyde on TiO2, CeO2 and Al2O3

Raskó, J.; Kiss, János

doi:10.1016/j.apcata.2005.04.003

Cited by 130 publications

(155 citation statements)

References 20 publications

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“…The binding energy of crotonaldehyde is estimated to be fairly high, ΔE = -82.93 kJ mol -1 , which is in qualitative agreement with the temperature programmed desorption (TPD) study by Raskó and Kiss which showed no substantial crotonaldehyde and water desorption below a substrate temperature of 473 K [48]. The same study indicated that acetaldehyde desorbs with a TPD peak maximum at 423 K.…”

Section: Figure 11supporting

confidence: 75%

“…In addition, other absorption bands appear at 1643 cm -1 and 1674 cm -1 , and weaker bands are noted at 1355 cm -1 and 1375 cm -1 . The former two peaks have previously been assigned to the δ(CH) and δ s (CH 3 ) modes in acetaldehyde [48]. However, as we demonstrate below, the assignment of the weaker bands in the carbonyl region between 1640 cm -1 and 1680 cm -1 is non-trivial.…”

Section: Acetaldehyde Adsorptionmentioning

confidence: 71%

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Acetaldehyde adsorption and condensation on anatase TiO2: Influence of acetaldehyde dimerization

Stefanov

Topalian

Granqvist

et al. 2014

Journal of Molecular Catalysis A: Chemical

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Conversion of acetaldehyde to crotonaldehyde on anatase TiO 2 films was studied by in situ Fourier transform infrared spectroscopy (FTIR) and by density functional theory (DFT) calculations. In situ FTIR showed that acetaldehyde adsorption is accompanied by the appearance of a hitherto nonassigned absorption band at 1643 cm -1 , which is shown to be due to acetaldehyde dimers. The results were supported by DFT calculations. Vibrational frequencies calculated within a partially relaxed cluster model for molecular acetaldehyde and its dimer, and for the corresponding adsorbed species on the anatase (101) surface, were in good agreement with experimental results. A kinetic model was constructed based on the combined FTIR and DFT results, and was shown to explain the essential features of the acetaldehyde condensation reaction.

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Section: Figure 11supporting

confidence: 75%

Section: Acetaldehyde Adsorptionmentioning

confidence: 71%

Acetaldehyde adsorption and condensation on anatase TiO2: Influence of acetaldehyde dimerization

Stefanov

Topalian

Granqvist

et al. 2014

Journal of Molecular Catalysis A: Chemical

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“…The spectrum at room temperature reveals the presence of different species related to the adsorption of acetaldehyde on the surface. In the range 3000-2800 cm -1 the ν C-H modes of acetates and ethoxides [26,27] are evident. Molecularly adsorbed acetaldehyde is recognizable by the band at 1722 cm -1 (ν C=O ).…”

Section: Time On Stream (H)mentioning

confidence: 95%

Initial steps in the production of H2 from ethanol: A FT-IR study of adsorbed species on Ni/MgO catalyst surface

Resini

Cavallaro

Frusteri³

et al. 2007

React Kinet Catal Lett

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Reactivity of pure ethanol and acetaldehyde on Ni/MgO catalyst at different reaction temperatures was investigated confirming that hydrogen production is ascribable to a series of consecutive and/or parallel reactions. FT-IR studies on adsorbed dry molecules (ethanol or acetaldehyde) showed that ethanol decomposition occurs on catalyst surface through formation of acetaldehyde, which is converted to acetates and then to carbonates, or decomposes to CO, C and H 2 .

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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%

Ceria‐Based Solid Catalysts for Organic Chemistry

Vivier¹,

Duprez²

2010

ChemSusChem

362

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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Adsorption and surface reactions of acetaldehyde on TiO2, CeO2 and Al2O3

Cited by 130 publications

References 20 publications

Acetaldehyde adsorption and condensation on anatase TiO2: Influence of acetaldehyde dimerization

Acetaldehyde adsorption and condensation on anatase TiO2: Influence of acetaldehyde dimerization

Initial steps in the production of H2 from ethanol: A FT-IR study of adsorbed species on Ni/MgO catalyst surface

Ceria‐Based Solid Catalysts for Organic Chemistry

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