Effect of calcination process on performance of 3DOM CeMnO3 catalysts

Liu, Xin; Lv, Xinyi; Wang, Yongqiang; Zhao, Chaocheng; Liu, Fang

doi:10.1016/j.jre.2020.09.002

Cited by 16 publications

(8 citation statements)

References 22 publications

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“…X-ray diffraction (XRD) patterns of 3DOM CeBO 3 (B = Cr, Ni, Mn) perovskite catalysts prepared by the PMMA hard template method are displayed in Figure . As seen from the patterns, all catalysts showed strong diffraction peaks in the scanning range (5–75°), indicating that these samples had high crystallinity and purity under high-temperature treatment, and the diffraction peaks at 2θ = 33.1, 37.2, 43.4, 47.5, and 56.3° belonged to the perovskite, corresponding to the diffraction peaks in the literature, − proving that the B-site substituted perovskite materials have been successfully synthesized. In addition, some oxide characteristic peaks were observed, with a characteristic peak of CeO 2 at 28.6° from all three samples, corresponding to the (111) crystal plane of the cubic fluorite structure CeO 2 (JCPDS #34-0394).…”

Section: Resultssupporting

confidence: 60%

Effect of B-Site Element on the Structure and Catalytic Performance for Toluene of the 3DOM CeBO₃ Catalyst

Zhang

Cao

et al. 2023

Inorg. Chem.

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A series of 3DOM cerium-based perovskite catalysts with different B-site elements were prepared by the colloidal crystal template method and excess impregnation method with Cr, Ni, and Mn as the B-site elements. The physical and chemical properties of the catalysts were investigated by X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), hydrogen temperature-programmed reduction (H2-TPR), and oxygen temperature-programmed desorption (O2-TPD) characterization techniques. The results showed that the catalyst with Mn as the B-site element had a high-quality macropore structure (pore size 200–250 nm), large specific surface area (45.26 m2/g), and abundant surface adsorbed oxygen content (Oads/Olatt = 0.46). The addition of manganese enhanced the low-temperature reducibility, and the main reduction peak was below 400 °C. The O2-TPD results showed that 3DOM CeMnO3 expressed the highest adsorption oxygen content. The 3DOM CeMnO3 possessed the best catalytic performance with T 50% = 102 °C and T 90% = 203 °C during the catalytic oxidation of toluene. Intermediate product study hinted that toluene was first converted into benzoic acid and benzaldehyde and then further degraded into small molecules. The catalyst with the best activity also exhibited good stability, and toluene degradation rate remained above 85% at 200°C for more than 20 h of continuous experiments.

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Section: Resultssupporting

confidence: 60%

Effect of B-Site Element on the Structure and Catalytic Performance for Toluene of the 3DOM CeBO₃ Catalyst

Zhang

Cao

et al. 2023

Inorg. Chem.

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“…For CeMnO x solid solution, the reduction peak around 352 °C relates with the reduction of Mn 4+ to Mn 3+ , and another peak at 460 °C is assigned to the surface lattice oxygen of CeO 2 , , suggesting the existence of Ce–O and Mn–O bonds in CeMnO x . The reduction peaks of CeMnO 3 at 328 and 489 °C are attributed to the reduction of Mn 4+ to Mn 3+ and Mn 3+ to Mn 2+ , respectively. , The peak of Mn 4+ to Mn 3+ in CeMnO 3 perovskite moves to a lower temperature as compared with CeMnO x , indicating that the structure of CeMnO 3 facilitates the reducibility of Mn species in the sample Figure b,c shows the Mn 2p and Ce 3d XPS spectra of CeMnO 3 and CeMnO x , respectively.…”

Section: Resultsmentioning

confidence: 94%

Stable and Active Au Catalyst Supported on CeMnO₃ Perovskite for Selective Oxidation of Glycerol

Jiang

Zhang

et al. 2023

Inorg. Chem.

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The selective oxidation of glycerol holds promise to transform glycerol into value-added chemicals. However, it remains a big challenge to achieve satisfactory selectivity toward the specific product at high conversion due to the multiple reaction pathways. Here, we prepare a hybrid catalyst via supporting Au nanoparticles on CeMnO3 perovskite with a modest surface area, achieving promoted conversion of glycerol (90.1%) and selectivity of glyceric acid (78.5%), which are much higher than those of CeMnO x solid-solution-supported Au catalysts with larger surface area and other Ce-based or Mn-based Au catalysts. The strong interaction between Au and CeMnO3 perovskite facilitates the electron transfer from the B-site metal (Mn) in the CeMnO3 perovskite to Au and stabilizes Au nanoparticles, which results in the enhanced catalytic activity and stability for glycerol oxidation. Valence band photoemission spectral analysis reveals that the uplifted d-band center of Au/CeMnO3 promotes the adsorption of the glyceraldehyde intermediate on the catalyst surface, which benefits further oxidation of glyceraldehyde into glyceric acid. The flexibility of the perovskite support provides a promising strategy for the rational design of high-performance glycerol oxidation catalysts.

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Section: Recent Advances In Perovskite Oxides As Catalysts For Voc Re...mentioning

confidence: 99%

“…Table 1 summarizes the preparation methods, BETspecific surface area, and catalytic performance of perovskite oxide-based catalysts with different morphologies mentioned in this section for various VOC oxidation reactions. [110,[180][181][182][183]188,[190][191][192] LaCoO 3 -based catalysts were prepared by an electrospinning method for the catalytic combustion of benzene, showing different morphologies including nanorod and nanofiber, which displayed a crucial role on the catalytic activity. [180][181][182] Generally, LaCoO 3 -based catalysts with nanorod morphology showed better catalytic activity than that with nanofiber morphology for catalytic combustion of benzene.…”

Section: Other Nanostructuresmentioning

confidence: 99%

“…For example, 3DOM CeMnO 3 calcined at 600 °C and 3DOM SrFeO 3 fabricated with 3 mL ethylene glycol showed best catalytic activity for toluene oxidation (T 90 values were 205 °C and 347 °C, respectively) among all the samples in relevant work. [183,192] Recently, it has been reported that the nanostructure and defect amount of perovskite oxides can be tailored by the acid treatment, which can increase the specific surface area and improve the catalytic activity. [193] Yao et al [193] treated LaCoO 3 with acidic H 2 O 2 solution to obtain composite catalyst composed of highly dispersed Co 3 O 4 nanoparticles and LaCoO 3 , which showed excellent catalytic activity for propane combustion.…”

Section: Other Nanostructuresmentioning

confidence: 99%

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Perovskite Oxides in Catalytic Combustion of Volatile Organic Compounds: Recent Advances and Future Prospects

Yang

Sun

et al. 2022

Energy & Environ Materials

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Volatile organic compounds are a kind of important indoor and outdoor air pollutants. In recent years, more and more attention has been paid to the ways of volatile organic compound elimination because of its potential long‐term effects on human health. Among the various available methods for volatile organic compound elimination, the catalytic combustion is the most attractive method due to its high efficiency, low cost, simple operation, and easy scale‐up. Perovskite oxides, as a large family of metal oxides with their A‐site mainly of lanthanide element and/or alkaline earth metal element and B‐site of transition metal element, have been extensively investigated as active and stable catalysts for volatile organic compound removal reactions due to their abundant compositional elements, high thermal/chemical stability, and compositional/structural flexibility. The catalytic performance of perovskite oxides is strongly depended on its material composition, morphology, and surface/bulk properties, while the doping, tailored synthesis route, and composite construction may have a significant effect on the bulk (oxygen vacancy concentration, lattice structure), surface (oxygen species, defect) properties, and particulate morphology, consequently the catalytic activity and stability for volatile organic compound removal. Herein, a comprehensive review about the recent advances in perovskite oxides for volatile organic compound elimination reactions based on catalytic combustion is presented from different aspects with a special emphasis on the material design strategies, such as compositional tuning, morphology control, nanostructure building, hybrid construction, and surface modification. At last, some perspectives are presented on the development and design of perovskite oxide‐based catalysts for volatile organic compound removal applications by highlighgting the critical issues and challenges.

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Effect of calcination process on performance of 3DOM CeMnO3 catalysts

Cited by 16 publications

References 22 publications

Effect of B-Site Element on the Structure and Catalytic Performance for Toluene of the 3DOM CeBO₃ Catalyst

Effect of B-Site Element on the Structure and Catalytic Performance for Toluene of the 3DOM CeBO₃ Catalyst

Stable and Active Au Catalyst Supported on CeMnO₃ Perovskite for Selective Oxidation of Glycerol

Perovskite Oxides in Catalytic Combustion of Volatile Organic Compounds: Recent Advances and Future Prospects

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Effect of calcination process on performance of 3DOM CeMnO3 catalysts

Cited by 16 publications

References 22 publications

Effect of B-Site Element on the Structure and Catalytic Performance for Toluene of the 3DOM CeBO3 Catalyst

Effect of B-Site Element on the Structure and Catalytic Performance for Toluene of the 3DOM CeBO3 Catalyst

Stable and Active Au Catalyst Supported on CeMnO3 Perovskite for Selective Oxidation of Glycerol

Perovskite Oxides in Catalytic Combustion of Volatile Organic Compounds: Recent Advances and Future Prospects

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Product

Resources

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Effect of B-Site Element on the Structure and Catalytic Performance for Toluene of the 3DOM CeBO₃ Catalyst

Effect of B-Site Element on the Structure and Catalytic Performance for Toluene of the 3DOM CeBO₃ Catalyst

Stable and Active Au Catalyst Supported on CeMnO₃ Perovskite for Selective Oxidation of Glycerol