Catalytic evaluation of mesoporous metal oxides for liquid phase oxidation of styrene

Masunga, Ngonidzashe; Tito, Ginny S.; Meijboom, Reinout

doi:10.1016/j.apcata.2017.12.010

Cited by 64 publications

(35 citation statements)

References 44 publications

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“…This is because the excess oxidant will occupy a large amount of active sites, and thus reducing the chance to interact between cyclooctenes and catalysts. Besides, this may also lead to the formation of undesired by‐products [5a,24] . Therefore, 15 mM of TBHP was considered to be the optimal value in this study.…”

Section: Resultsmentioning

confidence: 99%

Bimetallic‐organic Frameworks CoMo‐ZIF‐67: An Efficient and Stable Catalyst for Selective Oxidation of Alkenes

et al. 2020

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Developing catalysts for the selective oxidation of alkenes with environment‐friendly, unique structural characteristics, high economic benefit and better catalytic performance is important. Herein, we employed ZIF‐67 as the sacrificial template to synthesize bimetallic‐organic frameworks CoxMo100‐x‐ZIF nanocages by a facile dissolution‐regrowth strategy. The Co51.8Mo48.2‐ZIF catalyst was tested under various experimental parameters for the selective oxidation of cyclooctene to screen the optimal reaction conditions. Under the optimal reaction conditions, Co51.8Mo48.2‐ZIF nanocages exhibited a high cyclooctene conversion of 99.3 % and a selectivity of 99.0 % to epoxy cyclooctane. Furthermore, Co51.8Mo48.2‐ZIF nanocages can maintain their catalytic performance after reused five catalytic cycles. This bimetallic catalyst could also be used for the epoxidation of a wide range of alkenes, such as hexene or cyclohexene. In addition, the kinetic studies were conducted, and a reasonable reaction mechanism was proposed based on density functional theory calculations. The outstanding catalytic performance of CoxMo100‐x‐ZIF nanocages can be attributed to the cooperativity between Co and Mo sites and the hollow structure with high surface areas.

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Section: Resultsmentioning

confidence: 99%

Bimetallic‐organic Frameworks CoMo‐ZIF‐67: An Efficient and Stable Catalyst for Selective Oxidation of Alkenes

et al. 2020

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“…Eventually, greater number of effective collisions occurred, and more styrene was successfully oxidized. 9 The selectivity of StO was calculated to be $68% when the reaction temperature was 60-80 C. Further increase to 100 C reduced the selectivity of StO to 61.6%. At 100 C, H 2 O 2 rapidly decomposed to form hydroxyl and hydroperoxyl radicals that can easily oxidize StO to BZ.…”

Section: Epoxidation Of Styrenementioning

confidence: 99%

“…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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“…The Au/meso-Fe2O3 catalyst still exhibits typical type IV isotherms with a mesoporous structure [30,31]. The retention of this kind of pore is beneficial for the diffusion of lignin into the catalyst, which can enhance mass transport and react with the catalytic active sites [32]. Combined with the XRD characterization of Au/meso-Fe2O3, the Brunauer−Emmett−Teller (BET) surface area of spent Au/meso-Fe2O3 was similar to the fresh one, which indicates the robust mesoporous structure and high recycling ability of the catalyst.…”

Section: Characterization Of the Catalystsmentioning

confidence: 99%

Section: Characterization Of the Catalystsmentioning

confidence: 99%

Enhanced Selective Production of Carbonyl Products for Aerobic Oxidation of Benzylic Alcohols over Mesoporous Fe2O3 Supported Gold Nanoparticles

Jia

Chen

2019

Catalysts

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Ordered mesoporous Fe2O3 supported gold nanoparticles with a desired specific surface area and porous structure (Au/meso-Fe2O3) was successfully fabricated with a hard templating method by using KIT-6 as the template. The morphology and physico-chemical properties of Au/meso-Fe2O3 were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM), etc. The gold nanoparticles are highly dispersed on the surface of the mesoporous Fe2O3. The catalytic performance of the synthesized catalyst was studied for the aerobic oxidation of benzylic alcohols in β–O–4 linked lignin model dimers to the corresponding carbonyl products under atmosphere pressure. Au/meso-Fe2O3 shows an enhanced activity for the aerobic oxidation of 1-phenylethanol in comparison with that of Au/bulk-Fe2O3. The promoted catalytic activity is related to the confined porous structure of mesoporous Fe2O3 and more boundaries contact between gold and meso-Fe2O3, which shows that the porous structure of the support has a significant influence on the activity of gold catalysts.

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Catalytic evaluation of mesoporous metal oxides for liquid phase oxidation of styrene

Cited by 64 publications

References 44 publications

Bimetallic‐organic Frameworks CoMo‐ZIF‐67: An Efficient and Stable Catalyst for Selective Oxidation of Alkenes

Bimetallic‐organic Frameworks CoMo‐ZIF‐67: An Efficient and Stable Catalyst for Selective Oxidation of Alkenes

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

Enhanced Selective Production of Carbonyl Products for Aerobic Oxidation of Benzylic Alcohols over Mesoporous Fe2O3 Supported Gold Nanoparticles

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