Effect of alkali-metal promoter on silica-supported copper catalysts in benzyl alcohol oxidation

Arai, Masahide; Nishiyama, Satoru; Tsuruya, Shigeru; Masai, Mitsuo

doi:10.1039/ft9969202631

Cited by 35 publications

(20 citation statements)

References 27 publications

(1 reference statement)

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“…Aci d E ster Despite the promoter ions being mentioned several times in the literature, their major role in catalytic reactions is still unclear [42][43][44][45]. A trend of increasing catalytic activity with the increasing size/charge ratio of promoter cations has not been previously observed.…”

Section: Aldehydementioning

confidence: 99%

Ion induced promotion of activity enhancement of mesoporous manganese oxides for aerobic oxidation reactions

Biswas

Poyraz

Meng

et al. 2015

Applied Catalysis B: Environmental

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a b s t r a c tInverse micelle templated mesoporous manganese oxide (University of Connecticut mesoporous material, UCT-1) and ion promoted mesoporous manganese oxides (UCT-18-X, X = Mg 2+ , Ca 2+ , K + , Na + and Cs + ) having trace amount of alkali metal ions as promoters with tunable porosity and crystallinity were synthesized. The synthesis was based on the use of inverse micelles as soft templates and unique NO x chemistry as established for recently discovered UCT materials. The materials were tested for selective aerobic alcohol oxidation and the catalytic activity followed the order of UCT-1 < UCT-18-Mg < UCT-18-Ca < UCT-18-K < UCT-18-Na < UCT-18-Cs. The catalytic activity was correlated to the promoter ion induced increase in basicity of the materials. The retention of an amorphous structure, low reducibility, and the effects of lattice oxygen are other key factors responsible for the enhanced catalytic activity. The UCT-18-Cs catalyst was found to oxidize various alcohols to corresponding aldehydes and ketones selectively (100% selectivity) with very high conversion (as high as 100%). The UCT-18-Cs also exhibited solvent free green oxidation of 1.3.5-trimethylbenzene to yield 3,5-dimethylbenzoic acid and (3,5-dimethylphenyl)methyl ester with >90% conversion and 90% selectivity for the acid and 9% selectivity for the ester.

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Section: Aldehydementioning

confidence: 99%

Ion induced promotion of activity enhancement of mesoporous manganese oxides for aerobic oxidation reactions

Biswas

Poyraz

Meng

et al. 2015

Applied Catalysis B: Environmental

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“…Catalytic vapor phase oxidation of benzyl alcohol has been widely investigated [15][16][17][18][19][20][21][22]. However, since the carbon loss in the vapor phase benzyl alcohol oxidation is very appreciable due to the formation of carbon oxides, it is preferable to produce benzaldehyde more selectively by catalytic liquid phase oxidation of benzyl alcohol.…”

Section: Introductionmentioning

confidence: 99%

Supported Nano-Gold Catalysts for Epoxidation of Styrene and Oxidation of Benzyl Alcohol to Benzaldehyde

Choudhary

Dumbre

2009

Top Catal

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Nano-gold particles supported on different alkaline earth oxides (viz. MgO, CaO, BaO and SrO), Gr. IIIa metal oxides (viz. Al 2 O 3, Ga 2 O 3, In 2 O 3 and Tl 2 O 3 ), transition metal oxides (viz), rare earth metal oxides ([all prepared by depositing gold on corresponding metal oxide support by deposition precipitation (DP) and/or homogeneous deposition precipitation (HDP) method] were evaluated for their catalytic performance in the liquid phase epoxidation of styrene by tert-butyl hydroperoxide (TBHP) to styrene oxide and also in the solvent-free benzyl alcohol-to-benzaldehyde oxidation (by molecular oxygen or TBHP) reactions. For the epoxidation, the catalytic performance (styrene oxide yield) of the most promising nano-gold catalysts prepared by the HDP method was in the following order: Au/MgO [

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“…Up to now, catalytic vapor-phase oxidation of benzyl alcohol to benzaldehyde has been widely investigated. [23][24][25] The few studies on the liquid-phase oxidation of benzyl alcohol mainly focus on expensive metals, such as Ru, Pd, or Pd-Ag, [26][27] heteropolyacids [28] and some Cu, Fe, and Mn complexes. [29][30][31][32][33][34] In addition, the traditional reactions are often performed in environmentally undesirable solvents.…”

Section: Introductionmentioning

confidence: 99%

Fe(Cu)‐Containing Coordination Polymers: Syntheses, Crystal Structures, and Applications as Benzyl Alcohol Oxidation Catalysts

et al. 2006

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In this paper three coordination polymers, {[Fe(fcz) were synthesized. Crystallographic analysis reveals that polymer 1 exhibits a 2-D rhombohedral grid structure with (4, 4) nets, while polymer 2 has a 1-D double-chain framework. The structure of polymer 3 is similar to that of 1. We found that polymers 1-3 could effectively catalyze the oxidation of benzyl alcohol to benzaldehyde with H 2 O 2 (30 mass-%) as oxidant in aqueous medium. Various reaction conditions were studied, and optimal reaction conditions

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Effect of alkali-metal promoter on silica-supported copper catalysts in benzyl alcohol oxidation

Cited by 35 publications

References 27 publications

Ion induced promotion of activity enhancement of mesoporous manganese oxides for aerobic oxidation reactions

Ion induced promotion of activity enhancement of mesoporous manganese oxides for aerobic oxidation reactions

Supported Nano-Gold Catalysts for Epoxidation of Styrene and Oxidation of Benzyl Alcohol to Benzaldehyde

Fe(Cu)‐Containing Coordination Polymers: Syntheses, Crystal Structures, and Applications as Benzyl Alcohol Oxidation Catalysts

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