Selective oxidation of styrene catalyzed by cerium-doped cobalt ferrite nanocrystals with greatly enhanced catalytic performance

Tong, Jinhui; Li, Wenyan; Bo, Lili; Wang, Huan; Hu, Yusen; Zhang, Zhixia; Mahboob, Abdulla

doi:10.1016/j.jcat.2016.10.003

Cited by 87 publications

(31 citation statements)

References 66 publications

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“…7 However, the poor epoxide selectivity due to the rapid decomposition of H 2 O 2 at high temperature has limited its industrial viability. 8,9 This shortcoming can be overcome with the use of catalysts. Metal-based catalysts are among the most extensively studied catalytic systems in H 2 O 2 driven epoxidation of styrene.…”

Section: Introductionmentioning

confidence: 99%

Influence of Mg/CTAB ratio on the structural, physicochemical properties and catalytic activity of amorphous mesoporous magnesium silicate catalysts

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Influence of Mg/CTAB ratio on the structural, physicochemical properties and catalytic activity of amorphous mesoporous magnesium silicate catalysts

et al. 2019

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“…As reported in literature, oxidation of cyclohexene by H 2 O 2 gave mainly cyclohexene oxide (Cyox), cyclohex‐2‐enol (2‐cyclohexenol, Hexnol), cyclohexane‐1,2‐diol (Hexdiol), cyclohex‐2‐enone (Hexnon) and 2‐hydroxycyclohexan‐1‐one (Hyhexnon; Scheme ).…”

Section: Resultsmentioning

confidence: 59%

Polymer‐anchored mononuclear and binuclear Cu^II Schiff‐base complexes: Impact of heterogenization on liquid phase catalytic oxidation of a series of alkenes

Maurya

Kesharwani

Kachhap

et al. 2019

Applied Organom Chemis

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Liquid phase catalytic oxidation of a number of alkenes, for example, cyclohexene, cis‐cyclooctene, styrene, 1‐methyl cyclohexene and 1‐hexene, was performed using polymer‐anchored copper (II) complexes PS‐[Cu (sal‐sch)Cl] (5), PS‐[Cu (sal‐tch)Cl] (6), PS‐[CH2{Cu (sal‐sch)Cl}2] (7) and PS‐[CH2{Cu (sal‐tch)Cl}2] (8). Neat complexes [Cu (sal‐sch)Cl] (1), [Cu (sal‐tch)Cl] (2), [CH2{Cu (sal‐sch)Cl}2] (3) and [CH2{Cu (sal‐tch)Cl}2] (4) were isolated by reacting CuCl2·2H2O with [Hsal‐sch] (I), [Hsal‐tch] (II), [H2bissal‐sch] (III) and [H2bissal‐tch] (IV), respectively, in refluxing methanol. Complexes 1–4 have been covalently anchored in Merrifield resin through the amine nitrogen of the semicarbazide or thiosemicarbazide moiety. A number of analytical, spectroscopic and thermal techniques, such as CHNS analysis, Fourier transform‐infrared, UV–Vis, PMR, 13C‐NMR, electron paramagnetic resonance, scanning electron microscopy, energy‐dispersive X‐ray analysis, thermogravimetric analysis, atomic force microscopy, atomic absorption spectroscopy, and electrospray ionization‐mass spectrometry, were used to analyze and establish the molecular structure of the ligands (I)–(IV) and complexes (1)–(8) in solid state as well as in solution state. Grafted complexes 5–8 were employed as active catalysts for the oxidation of a series of alkenes in the presence of hydrogen peroxide. Copper hydroperoxo species ([CuIII (sal‐sch)‐O‐O‐H]), which is believed to be the active intermediate, generated during the catalytic oxidation of alkenes, are identified. It was found that supported catalysts are very economical, green and efficient in contrast to their neat complexes as well as most of the recently reported heterogeneous catalysts.

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“…The catalytic activities of these samples and the materials used as references (blank tests) were tested in the oxidation of styrene with TBHP. Acetonitrile was the solvent of choice, as it has shown optimal performance in selective oxidations [26,27]. Besides the conversion of styrene and TBHP, the Table 3 shows the selectivity of styrene towards the different oxidized products.…”

Section: Catalytic Performance Of Dmc In the Styrene Oxidation And Prmentioning

confidence: 99%

Role of the Outer Metal of Double Metal Cyanides on the Catalytic Efficiency in Styrene Oxidation

2019

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The catalytic efficiency of double metal cyanide (DMC) has been shown to be very effective in heterogeneous catalysis. The catalytic activity of the outer divalent cations (Mn, Co, Ni, and Cu) of a family of hexacyanocobaltates was examined in the oxidation reaction of styrene, as a model molecule, using tert Butyl Hydroperoxide (TBHP, Luperox®) as an oxidizing agent. The most electronegative outer cations showed the best conversions, with 95% for copper, followed by nickel with 85% conversion of the monomer at atmospheric pressure and temperature of 75 °C. The evidence showed that the catalytic activity and selectivity towards oxidized products are strongly linked to the accurate choice of the outer cation in the DMC together with the oxidizing agent.

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Selective oxidation of styrene catalyzed by cerium-doped cobalt ferrite nanocrystals with greatly enhanced catalytic performance

Cited by 87 publications

References 66 publications

Influence of Mg/CTAB ratio on the structural, physicochemical properties and catalytic activity of amorphous mesoporous magnesium silicate catalysts

Influence of Mg/CTAB ratio on the structural, physicochemical properties and catalytic activity of amorphous mesoporous magnesium silicate catalysts

Polymer‐anchored mononuclear and binuclear Cu^II Schiff‐base complexes: Impact of heterogenization on liquid phase catalytic oxidation of a series of alkenes

Role of the Outer Metal of Double Metal Cyanides on the Catalytic Efficiency in Styrene Oxidation

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Selective oxidation of styrene catalyzed by cerium-doped cobalt ferrite nanocrystals with greatly enhanced catalytic performance

Cited by 87 publications

References 66 publications

Influence of Mg/CTAB ratio on the structural, physicochemical properties and catalytic activity of amorphous mesoporous magnesium silicate catalysts

Influence of Mg/CTAB ratio on the structural, physicochemical properties and catalytic activity of amorphous mesoporous magnesium silicate catalysts

Polymer‐anchored mononuclear and binuclear CuII Schiff‐base complexes: Impact of heterogenization on liquid phase catalytic oxidation of a series of alkenes

Role of the Outer Metal of Double Metal Cyanides on the Catalytic Efficiency in Styrene Oxidation

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Polymer‐anchored mononuclear and binuclear Cu^II Schiff‐base complexes: Impact of heterogenization on liquid phase catalytic oxidation of a series of alkenes