Liquid phase acetophenone hydrogenation on Ru/Cr/B catalysts supported on silica

Casagrande, Manuela; Storaro, Loretta; Talon, Aldo; Lenarda, Maurizio; Frattini, Romana; Rodríguez‐Castellón, Enrique; Maireles‐Torres, Pedro

doi:10.1016/s1381-1169(02)00079-1

Cited by 46 publications

(26 citation statements)

References 19 publications

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“…41,214 The Sn-promoted Ru-B/SiO 2 catalyst is highly active and selective in the hydrogenation of carbonyl compounds to the corresponding alcohols at low temperature. 215 At 333 K, the benzaldehyde conversion over Ru-Sn-B/SiO 2 is nearly five times of that over Ru-B/SiO 2 . The hydrogenation of cinnamaldehyde (CMA), phenylacetaldehyde, aliphatic carbonyl compounds (capryl aldehyde and methyl hexyl ketone), diphenylketone, pyridine-2-carboxaldehyde, and 4-methoxybenzaldehyde was also evaluated at 333 K on Ru-Sn-B/SiO 2 , giving appreciable conversion and exclusive selectivity to alcohols, although the last two compounds are less reactive than others.…”

Section: 34mentioning

confidence: 92%

“…Selectivity manipulation is generally achieved by activating the carbonyl group and/or suppressing the adsorption of the conjugated olefinic bond or the phenyl ring. 211 Ni-, 81,82,86,128 Co-, 41,80,90,96,124,[212][213][214] and Ru-based amorphous alloy catalysts 95,215,216 have been investigated in chemoselective hydrogenation of unsaturated aldehydes or ketones. In the hydrogenation of furfural (FFR) to furfuryl alcohol (FFA), Mo, Ce, and Fe are effective promoters for Ni-B or Co-B.…”

Section: 34mentioning

confidence: 99%

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Synthesis and catalysis of chemically reduced metal–metalloid amorphous alloys

et al. 2012

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Amorphous alloys structurally deviate from crystalline materials in that they possess unique short-range ordered and long-range disordered atomic arrangement. They are important catalytic materials due to their unique chemical and structural properties including broadly adjustable composition, structural homogeneity, and high concentration of coordinatively unsaturated sites. As chemically reduced metal-metalloid amorphous alloys exhibit excellent catalytic performance in applications such as efficient chemical production, energy conversion, and environmental remediation, there is an intense surge in interest in using them as catalytic materials. This critical review summarizes the progress in the study of the metal-metalloid amorphous alloy catalysts, mainly in recent decades, with special focus on their synthetic strategies and catalytic applications in petrochemical, fine chemical, energy, and environmental relevant reactions. The review is intended to be a valuable resource to researchers interested in these exciting catalytic materials. We concluded the review with some perspectives on the challenges and opportunities about the future developments of metal-metalloid amorphous alloy catalysts.

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Section: 34mentioning

confidence: 92%

Section: 34mentioning

confidence: 99%

Synthesis and catalysis of chemically reduced metal–metalloid amorphous alloys

et al. 2012

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“…The hydrogenation of AP is usually performed on noble metal catalysts such as Ru [2,3], Pd [4,5], Pt [6,7], and so on. The hydrogenation of AP on Pt and Ru catalysts exhibits high selectivity for the hydrogenation of aromatic ring and poor selectivity for PHE [3,6].…”

Section: -Phenylethanol (Phe)mentioning

confidence: 99%

Highly Loaded and Dispersed Ni2P/Al2O3 Catalyst with High Selectivity for Hydrogenation of Acetophenone

Wang¹,

Wang²,

Chen³

et al. 2018

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Highly loaded and dispersed Ni 2 P/Al 2 O 3 catalyst was prepared by the phosphidation of Ni/Al 2 O 3 catalyst with Ni loading of 80 wt.% in liquid phase and compared with the Ni/Al 2 O 3 catalyst for the hydrogenation of acetophenone. X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) etc. were used to characterize the textural and structural properties of the prepared catalysts. It was found that the Ni/Al 2 O 3 and Ni 2 P/Al 2 O 3 catalyst possessed high surface area, loading and dispersion. The Ni/Al 2 O 3 catalyst had higher apparent activity while the Ni 2 P/Al 2 O 3 catalyst had higher intrinsic activity for the hydrogenation of acetophenone (AP). Remarkably, the Ni 2 P/Al 2 O 3 catalyst exhibited high selectivity to 1-phenylethanol, due to repulsion of the phosphorous (P δ− ) for phenyl group and attraction of the nickel (Ni δ+ ) for oxygen atom of carbonyl group, leading to preferential hydrogenation of carbonyl group in acetophenone. The effect of the particle size of the catalyst on the chemical selectivity might be another reason for high selectivity on the Ni 2 P/Al 2 O 3 catalyst.

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“…cations, formed on the TiO 2 support [22]. Also, the promotion of silica supported Ru catalysts with Cr ions enhances the selective reduction of C=O, but the overall activity decreases [23]. The selectivity increase is attributed to the strong interaction of the oxygen atom of C=O group with the Cr ions.…”

Section: Introductionmentioning

confidence: 99%

Hydrogenation of Acetophenone in the Presence of Ru Catalysts Supported on Amine Groups Functionalized Polymer

et al. 2010

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Liquid phase hydrogenation of acetophenone (ACT) is studied over ruthenium catalysts (1-4 wt% Ru) supported on gel-type methacrylate-styrene resin (FCN) functionalized with C=O, -NH, and -NH 2 groups. Microscopic studies (SEM, STEM) show that the nature of Ru particles depends on the level of Ru doping. At low Ru content (1-2 wt%) ruthenium nano-clusters are formed, while at 4 wt% Ru, metal crystallites of few nanometers in size are observed. Catalytic reactions are performed at mild conditions (atmospheric pressure of hydrogen, 40°C) in biphasic isooctane-water (IO/H 2 O) solvent system, and, for comparison, in a single component solvent (isooctane or ethanol). The use of biphasic IO/H 2 O solvent system results in a dramatic improvement of selectivity. The hydrogenation of C=O in acetophenone dominates over the hydrogenation of aromatic ring, yielding 1-phenylethanol with ca. 80% selectivity. Ru/FCN catalysts exhibit higher selectivity than the reference Ru/Al 2 O 3 . This is tentatively assigned to the steric effects induced by the polymer network on migrating reactant molecules. Advantageous influence of biphasic IO/H 2 O solvent system has been attributed to the solvation of phenyl ring of acetophenone by non-polar isooctane, which facilitates the interaction with the catalyst surface via carbonyl group and leads to the preferential reduction to 1-phnenylethanol.

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Liquid phase acetophenone hydrogenation on Ru/Cr/B catalysts supported on silica

Cited by 46 publications

References 19 publications

Synthesis and catalysis of chemically reduced metal–metalloid amorphous alloys

Synthesis and catalysis of chemically reduced metal–metalloid amorphous alloys

Highly Loaded and Dispersed Ni2P/Al2O3 Catalyst with High Selectivity for Hydrogenation of Acetophenone

Hydrogenation of Acetophenone in the Presence of Ru Catalysts Supported on Amine Groups Functionalized Polymer

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