Effective ternary copper-cerium-cobalt catalysts synthesized via a modified pechini method for selective oxidation of ethylbenzene

Jie, Shanshan; Lin, Xiu; Chao, Zi‐Sheng; Liu, Zhigang

doi:10.1016/j.matchemphys.2018.04.049

Cited by 25 publications

(13 citation statements)

References 51 publications

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“…To improve the catalytic performance of pure CeO 2 in the selective oxidation of primary C–H bonds in hydrocarbons by O 2 , several strategies such as modifying CeO 2 with noble metal clusters (e.g., Au) or metal oxides , and doping CeO 2 with other metals (e.g., Cr, Mn) , have been reported. Au cluster-CeO 2 catalysts can efficiently catalyze the selective oxidation of C–H bonds in inert hydrocarbons in O 2 atmosphere under solvent-free conditions, owing to strong metal–support interaction.…”

Section: Ceria-based Catalysts For Selective Oxidation Via Thermocata...mentioning

confidence: 99%

“…Compared with the expensive noble metals, CeO 2 -based transition metal catalysts have attracted large attention due to their cost-effective performance. , Doping CeO 2 with transition-metal atoms into the ceria lattice is another widely adopted strategy to further decrease the energy barrier for oxygen vacancy formation, promote O 2 activation and lattice oxygen mobility, which could enhance the catalytic activity for selective oxidation of hydrocarbons. The active electron-deficient metal species such as Cu + , Co 2+ , Cr 3+ , Mn 4+ , and Ce 3+ activate the dissociation of C–H bonds and O 2 .…”

Section: Ceria-based Catalysts For Selective Oxidation Via Thermocata...mentioning

confidence: 99%

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Ceria-Based Materials for Thermocatalytic and Photocatalytic Organic Synthesis

et al. 2021

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Value-added chemicals, fuels, and pharmaceuticals synthesized by organic transformation from raw materials via catalytic techniques have attracted enormous attention in the past few decades. Heterogeneous catalysts with high stability, long cycling life, good environmental-friendliness, and economic efficiency are greatly desired to accomplish the catalytic organic transformations. With the advantages of reversible Ce3+/Ce4+ redox pairs, tailorable oxygen vacancies, and surface acid–base properties, ceria-based catalysts have been actively investigated in the fields of catalytic organic synthesis. In this Review, we summarize the fundamentals and latest applications of ceria-based heterogeneous catalysts for organic transformations via thermocatalytic and photocatalytic routes. The fabricating approaches of various ceria and ceria-based catalysts and their structure/composition–activity relationship are discussed and prospected. The advanced characterization techniques and theoretical methods for reaction mechanism studies over CeO2-based catalysts are summarized and discussed. This comprehensive Review provides a basic understanding of the structure–performance relationships of ceria-based catalysts for organic synthesis. In addition, it also provides some insights and outlooks in the design and research direction in the ceria-based catalysts with better performance.

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Section: Ceria-based Catalysts For Selective Oxidation Via Thermocata...mentioning

confidence: 99%

Section: Ceria-based Catalysts For Selective Oxidation Via Thermocata...mentioning

confidence: 99%

Ceria-Based Materials for Thermocatalytic and Photocatalytic Organic Synthesis

et al. 2021

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“…immobilized metalloporphyrins and their catalysis systems [31][32][33][34][35] adapting to the cleaner production process. However, the resulting yields (acetophenone and phenylethanol (ONE + OL), less than 25%) were lower than those obtained from the catalytic systems above [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] . In addition, RSM was also seldom used in the catalytic field of metalloporphyrins [14][15][16][17]19,20,[31][32][33][34][35] .…”

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confidence: 75%

Full use of factors promoting catalytic performance of chitosan supported manganese porphyrin

Huang

Wang

et al. 2020

Sci Rep

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in order to make full use of the impact of internal and external factors on the performance of title catalyst for ethyl benzene oxidation, the key internal influencing factors on the catalytic performance were modulated by coordinating and grafting manganese porphyrin to mesoporous and macroporous chitosan, and the important external factors (i.e. oxidation reaction conditions) were optimized using Response Surface Methodology. Under the Response Surface Methodology optimized oxidation reaction conditions (176.56 °C, 0.59 MPa, and 0.25 mg amount of manganese porphyrin), the catalyst could be used at least five times. The ethyl benzene conversion, catalyst turnover numbers, and yields reached up to 51.2%, 4.37 × 10 6 and 36.4% in average, respectively. Compared with the other optimized oxidation reaction conditions, the corresponding values increased 17%, 26% and 53%. Relative to the manganese porphyrin, the catalytic performance and efficiency of the immobilized catalyst had notably increased. High-efficiency and high-selectivity oxidation of ethyl benzene (EB) has been still paid a great attention 1-6. There were so many advanced catalysts and catalytic ethyl benzene oxidation technologies 1-25 , some of which could even offer high yields of products 1-6. However, up to date the oxidation techniques used are not very satisfactory yet: There were mainly lack of cleaner production techniques, for examples, O 2 was not used as oxidant, toxic solvents were used, some energy saving and emission reduction had not been done, and so on. Therefore, the catalyst preparation 21-25 , the catalytic oxidation system and the oxidation conditions 7-20 , which are satisfactorily meeting to the cleaner production process should be comprehensively considered. Based on the above considerations, the internal influencing factors on the catalytic performance of catalyst should be further reasonably tuned, and the external influencing factors should be optimized via Response Surface Methodology (RSM). Because RSM has been successfully used in other catalysis fields: It has been used for optimization of the various reaction conditions and prediction of interactions between the influencing reaction condition parameters based on constructing a suitable model, evaluating the effects of key factors and searching the optimum reaction conditions. The better catalysis responses have achieved 26-29. These considerations and the various optimizations above will probably bring the advanced catalysis techniques 7-25 forwards better catalytic results and excellent various applications in practical chemistry industry. Due to a great deal of attention to the environmental issues, for modern companies which are manufacturing the products of acetophenone and phenylethanol via ethyl benzene oxidation, a set of strict modern technique of cleaner production has to be requested. Under the preconditions, the immobilized metalloporphyrins and their catalysis systems, which are usually not added any additives, co-reductants, and solvents, but oxygen molecules...

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“…Thus, to meet the requirements of green and economical production in the selective EB oxidation reaction, it is a great challenge to develop a suitable catalyst to attain a favorable performance with molecular oxygen as the oxidant in the absence of any solvents and additives. In recent years, some researchers have attempted to achieve this goal with a few kinds of catalysts, such as the Mn/N–C/Al 2 O 3 catalyst, ternary Cu–Ce–Co catalyst, CoO-containing zeolite beta catalyst, hollow MnO x /TS-1 catalyst, hexagonal mesoporous silica-supported Co 3 O 4 catalyst, Co–N–C-immobilized carbon nanotube catalyst, and nitrogen-doped carbon nanotube-encapsulated cobalt nanoparticle catalyst . Unfortunately, these catalysts are associated with one or more disadvantages of the complicated and tedious preparation process, insufficient activity and/or AcPO selectivity, and poor recycling performance.…”

Section: Introductionmentioning

confidence: 99%

CeO₂ Nanoparticle-Decorated Co₃O₄ Microspheres for Selective Oxidation of Ethylbenzene with Molecular Oxygen under Solvent- and Additive-Free Conditions

Liu

Meng

Jian

et al. 2020

ACS Sustainable Chem. Eng.

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An ideal catalytic process for the selective oxidation of hydrocarbons should employ an efficient, recyclable, and cost-effective catalyst under solvent- and additive-free conditions with molecular oxygen as the only oxidant. This is an important goal in the catalysis community and remains a significant challenge. In this respect, we report the facile construction of a series of uniform CeO2 nanoparticle-decorated Co3O4 microspheres (CeO2/Co3O4) for the selective ethylbenzene oxidation reaction by molecular oxygen. Among the catalysts with various CeO2 loading levels, CeO2/Co3O4-3 (5 wt % loading of CeO2) obtained by careful composition modulation exhibits the optimum reaction performance, with ethylbenzene conversion of 73.4% accompanied by a selectivity of 78.5% to acetophenone. The yield of acetophenone can achieve 57.6%, while the reaction rate can reach up to 401.3 mmol gcat –1 h–1. In addition, CeO2/Co3O4-3 presents robust stability and good recycling performance. The tailored CeO2/Co3O4-3 catalyst is superior to the reported catalysts, and it is the state-of-the-art catalyst under the current challenging reaction system. Experimental evidence and mechanism analysis suggest that the interface synergy featured with −Ce–OV–Co– active sites derived from the intimate connection between the two oxides is the dominant contributor in boosting the catalytic performance. This work can reinvigorate research into the exploitation of catalysts for the sustainable and green catalytic oxidation of ethylbenzene and beyond.

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Effective ternary copper-cerium-cobalt catalysts synthesized via a modified pechini method for selective oxidation of ethylbenzene

Cited by 25 publications

References 51 publications

Ceria-Based Materials for Thermocatalytic and Photocatalytic Organic Synthesis

Ceria-Based Materials for Thermocatalytic and Photocatalytic Organic Synthesis

Full use of factors promoting catalytic performance of chitosan supported manganese porphyrin

CeO₂ Nanoparticle-Decorated Co₃O₄ Microspheres for Selective Oxidation of Ethylbenzene with Molecular Oxygen under Solvent- and Additive-Free Conditions

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Effective ternary copper-cerium-cobalt catalysts synthesized via a modified pechini method for selective oxidation of ethylbenzene

Cited by 25 publications

References 51 publications

Ceria-Based Materials for Thermocatalytic and Photocatalytic Organic Synthesis

Ceria-Based Materials for Thermocatalytic and Photocatalytic Organic Synthesis

Full use of factors promoting catalytic performance of chitosan supported manganese porphyrin

CeO2 Nanoparticle-Decorated Co3O4 Microspheres for Selective Oxidation of Ethylbenzene with Molecular Oxygen under Solvent- and Additive-Free Conditions

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Product

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CeO₂ Nanoparticle-Decorated Co₃O₄ Microspheres for Selective Oxidation of Ethylbenzene with Molecular Oxygen under Solvent- and Additive-Free Conditions