M (M = Mn, Co, Cu)-CeO2 catalysts to enhance their CO catalytic oxidation at a low temperature: Synergistic effects of the interaction between Ce3+-Mx+-Ce4+ and the oxygen vacancy defects

Xiao, Mingjing; Zhang, Xu; Yang, Yaqi; Cui, Xiuxiu; Chen, Ting; Wang, Yude

doi:10.1016/j.fuel.2022.124379

Cited by 34 publications

(7 citation statements)

References 41 publications

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“…After loading the metal oxides onto the AC sample, characteristic peaks appear at 28.5°, 33.2°, 47.5°, and 56.5°, corresponding to the crystal planes (111), (200), (220), and (311) of CeO 2 , respectively. Furthermore, characteristic peaks of MnO at 34.9°, 40.5°, 58.5°, and 70° corresponding to the crystal planes (111), (200), (220), and (311) are observed . Characteristic peaks of CuO (213), (204), and (311) appear at 43.3°, 50.5°, and 73.9°, respectively.…”

Section: Results and Analysismentioning

confidence: 91%

“…Furthermore, characteristic peaks of MnO at 34.9°, 40.5°, 58.5°, and 70°corresponding to the crystal planes (111), (200), (220), and (311) are observed. 24 Characteristic peaks of CuO (213), (204), and (311) appear at 43.3°, 50.5°, and 73.9°, respectively. With increased loading content, the intensity of MnO peaks decreases, while the intensities of CuO and CeO 2 peaks increase.…”

Section: Xrd and Raman Analysismentioning

confidence: 99%

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Surface Effects of Trace CuMnCe Loading on Coal-Based Carbon Materials and Mechanisms of NO_x Adsorption and Removal

Han,

Shao,

Wang

et al. 2023

Energy Fuels

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This study employed the water-thermal coupled high-temperature CO2 gasification method using Zhundong coal as the raw material to prepare porous carbon materials. A dual-function catalyst for NO x adsorption and reduction was prepared by loading Cu, Mn, and Ce components onto the carbon material through hydrothermal impregnation. The influence of metal loading content on the pore structure, surface functional groups, and synergistic effects between metals in the carbon-based catalyst was investigated during the preparation process. In the process of NO x removal using carbon-based catalysts, the primary components comprise two distinct phases: NO x adsorption and CO-SCR experiments. The experimental sequence involves the initial execution of NO x adsorption tests, succeeded by subsequent reduction treatments. These processes are undertaken systematically to comprehensively investigate the attributes of the catalyst. The physical and chemical parameters of the samples were characterized using XRD, Raman, H2-TPR, NO x -TPD, and other techniques. Finally, the NO x adsorption and reduction mechanism of representative samples were deeply analyzed using in situ DRIFTS. The results showed that when the loading amounts of Cu, Mn, and Ce were 0.006, 0.012, and 0.003 g, respectively, the pore structure of the catalyst was excellent, with a NO x adsorption performance (q e) of 16.23 mg/g, and the NO conversion rate reached 66% at 200 °C. This is mainly attributed to the enhanced interaction between metal species on the catalyst surface by optimizing the metal content on the carbon support, which promotes the dissociation of NO in the NO + CO reaction. In situ DRIFTS results confirmed that NO and CO adsorb on the catalyst surface, and CO* reacts with NO* to produce N2 and CO2, following the Langmuir–Hinshelwood mechanism.

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Section: Results and Analysismentioning

confidence: 91%

Section: Xrd and Raman Analysismentioning

confidence: 99%

Surface Effects of Trace CuMnCe Loading on Coal-Based Carbon Materials and Mechanisms of NO_x Adsorption and Removal

Han,

Shao,

Wang

et al. 2023

Energy Fuels

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“…Mn can exhibit multivalent oxidation states when MnO y –CeO x solid solutions are formed. In addition to Mn 2+ , both Mn 3+ and Mn 4+ ions can enter the CeO x structure according to several reports. − …”

Section: Introductionmentioning

confidence: 88%

Manganese Defective Clustering: Influence on the Spectroscopic Features of Ceria-Based Nanomaterials

et al. 2023

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The influence of manganese modification on the spectroscopic features of manganese-doped CeO 2 systems synthesized by the microwave-assisted hydrothermal route and their correlation with the presence of O defective structures were verified, focusing on their interaction with poisonous atmospheres. Raman and electron paramagnetic resonance studies confirmed the presence of defective clusters formed by dipoles and/or quadrupoles. The number of paramagnetic species was found to be inversely proportional to the doping concentration, resulting in an increase in the Mn 2+ signal, likely due to the reduction of Mn 3+ species after the interaction with CO. X-ray photoelectron spectroscopy data showed the pure system with 33% of its cerium species in the Ce 3+ configuration, with an abrupt decrease to 19%, after the first modification with Mn, suggesting that 14% of the Ce 3+ species are donating one electron to the Mn 2+ ions, thus becoming nonparamagnetic Ce 4+ species. On the contrary, 58% of the manganese species remain in the Mn 2+ configuration with five unpaired electrons, corroborating the paramagnetic feature of the samples seen in the electron paramagnetic resonance study.

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“…They found that the temperature at which 50% CO conversion ( T 50 ) could be obtained was as low as 70 °C on Cu-doped CeO 2 , while the T 50 was 250 °C on CeO 2 without doping. 16 Lykaki et al studied the effect of Cu doping of CeO 2 nanoparticles with different shapes on CO oxidation and showed that the morphology of CeO 2 played a key role in the reducibility and oxygen mobility of the catalyst. 17 Bueno-Lopez et al used CeO 2 doped with appropriate cations (Pr, La, or Zr) to investigate the effect on soot combustion.…”

Section: Introductionmentioning

confidence: 99%

Revealing the intrinsic nature of Ni-, Mn-, and Y-doped CeO₂ catalysts with positive, additive, and negative effects on CO oxidation using operando DRIFTS-MS

Fang,

Sun,

et al. 2023

Dalton Trans.

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M (M = Mn, Co, Cu)-CeO2 catalysts to enhance their CO catalytic oxidation at a low temperature: Synergistic effects of the interaction between Ce3+-Mx+-Ce4+ and the oxygen vacancy defects

Cited by 34 publications

References 41 publications

Surface Effects of Trace CuMnCe Loading on Coal-Based Carbon Materials and Mechanisms of NO_x Adsorption and Removal

Surface Effects of Trace CuMnCe Loading on Coal-Based Carbon Materials and Mechanisms of NO_x Adsorption and Removal

Manganese Defective Clustering: Influence on the Spectroscopic Features of Ceria-Based Nanomaterials

Revealing the intrinsic nature of Ni-, Mn-, and Y-doped CeO₂ catalysts with positive, additive, and negative effects on CO oxidation using operando DRIFTS-MS

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M (M = Mn, Co, Cu)-CeO2 catalysts to enhance their CO catalytic oxidation at a low temperature: Synergistic effects of the interaction between Ce3+-Mx+-Ce4+ and the oxygen vacancy defects

Cited by 34 publications

References 41 publications

Surface Effects of Trace CuMnCe Loading on Coal-Based Carbon Materials and Mechanisms of NOx Adsorption and Removal

Surface Effects of Trace CuMnCe Loading on Coal-Based Carbon Materials and Mechanisms of NOx Adsorption and Removal

Manganese Defective Clustering: Influence on the Spectroscopic Features of Ceria-Based Nanomaterials

Revealing the intrinsic nature of Ni-, Mn-, and Y-doped CeO2 catalysts with positive, additive, and negative effects on CO oxidation using operando DRIFTS-MS

Contact Info

Product

Resources

About

Surface Effects of Trace CuMnCe Loading on Coal-Based Carbon Materials and Mechanisms of NO_x Adsorption and Removal

Surface Effects of Trace CuMnCe Loading on Coal-Based Carbon Materials and Mechanisms of NO_x Adsorption and Removal

Revealing the intrinsic nature of Ni-, Mn-, and Y-doped CeO₂ catalysts with positive, additive, and negative effects on CO oxidation using operando DRIFTS-MS