Hydrogenation of α,β-unsaturated carbonyl compounds over Au and Ir supported on SiO2

Rojas, Hugo; Díaz, Gabriela; Martínez, José Javier Pérez-Fadón; Castañeda, Claudia; Gómez-Cortés, Antonio; Arenas-Alatorre, Jesús

doi:10.1016/j.molcata.2012.05.025

Cited by 53 publications

(36 citation statements)

References 45 publications

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“…Similarly, Rojas et al. supported 6 nm Au nanoparticles on silica for the liquid‐phase hydrogenation of cinnamaldehyde at 80 °C and obtained a selectivity of 80 % …”

Section: Resultsmentioning

confidence: 97%

Chemoselective Hydrogenation of Crotonaldehyde Catalyzed by an Au@ZIF‐8 Composite

et al. 2016

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Au nanoparticles of size 2.2 nm were encapsulated in a zeolitic imidazolate framework ZIF‐8 framework (Au@ZIF‐8). The composite was used as a catalyst for the selective hydrogenation of crotonaldehyde to crotyl alcohol with 90–95 % selectivity. Hydrogenation of 1‐hexene yielded n‐hexane in approximately the same conversion as crotonaldehyde, whereas cis‐cyclohexene did not detectably react. To account for the confined environment of the ZIF, we supported Au nanoparticles on the outside of ZIF‐8 (Au/ZIF‐8). Using Au/ZIF‐8 as a catalyst, 1‐hexene and cis‐cyclohexene were hydrogenated in low conversion whereas crotonaldehyde would only react at higher pressures in 70 % selectivity towards crotyl alcohol. Post‐experiment TEM analysis of Au/ZIF‐8 showed significant sintering whereas the median particle size of Au@ZIF‐8 remained almost unchanged. Au@ZIF‐8 was recycled as a catalyst for the hydrogenation of crotonaldehyde three times without significant loss of activity or selectivity.

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“…Similarly, Rojas et al. supported 6 nm Au nanoparticles on silica for the liquid‐phase hydrogenation of cinnamaldehyde at 80 °C and obtained a selectivity of 80 % …”

Section: Resultsmentioning

confidence: 97%

Chemoselective Hydrogenation of Crotonaldehyde Catalyzed by an Au@ZIF‐8 Composite

et al. 2016

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“…The effect of hydrogen pressure on citral hydrogenation was studied over the catalyst Ni-Cr 2 O 3 (0.5 g) in ethanol (25 cm 3 ) at a temperature of 305 K. The results are shown in Fig. 3.…”

Section: International Journal Of Chemicalmentioning

confidence: 99%

The Liquid-Phase Hydrogenation of Citral to Citronellal at Hydrogen Pressure

Syunbayev¹,

Churina²,

Yergaziyeva³

et al. 2016

IJCEA

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Abstract-The aim of the work is to obtain citronellal that is the odoriferous substance and refers to the fragrant compounds used in perfumery and in the food industry as a flavoring. It is a raw material for producing aromatic substances -izopulegol, menthol, citronellol et al.The hydrogenation of citral to citronellal was investigated over the catalysts on the base of VIII group metals using special high-pressure kinetic (KEHP) equipment allowing to keep the liquid phase hydrogenation process for any constant hydrogen pressure in a wide variation of the experimental conditions.On the activity of the catalysts studied are located in the following sequence: NiR > Pt > Pd > Rh > Ni-black > Ir > Os > Ru.The effect of different key parameters of the process (nature of the solvent, reduction temperature of catalyst, hydrogen pressure, etc.) on the kinetics and selectivity of the hydrogenation of citral to citronellal over the supported nickel catalysts were studied.

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“…If ruthenium and platinum have been selected as metals for their well-known properties toward the selective hydrogenation of a, b-unsaturated aldehydes, researches conducted on gold in these hydrogenation reactions have been appearing only in the last few years [48][49][50][51]. Au possesses remarkable activity in the targeted reaction.…”

Section: Introductionmentioning

confidence: 99%

Covalently and non-covalently immobilized clusters onto nanocarbons as catalysts precursors for cinnamaldehyde selective hydrogenation

Vriamont

Haynes

McCague-Murphy

et al. 2015

Journal of Catalysis

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Hydrogenation of α,β-unsaturated carbonyl compounds over Au and Ir supported on SiO2

Cited by 53 publications

References 45 publications

Chemoselective Hydrogenation of Crotonaldehyde Catalyzed by an Au@ZIF‐8 Composite

Chemoselective Hydrogenation of Crotonaldehyde Catalyzed by an Au@ZIF‐8 Composite

The Liquid-Phase Hydrogenation of Citral to Citronellal at Hydrogen Pressure

Covalently and non-covalently immobilized clusters onto nanocarbons as catalysts precursors for cinnamaldehyde selective hydrogenation

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