Highly improved soot combustion performance over synergetic MnxCe1−xO2 solid solutions within mesoporous nanosheets

Wang, Jinguo; Yang, Shuaifeng; Sun, Honghua; Qiu, Jianqiang; Men, Yongfeng

doi:10.1016/j.jcis.2020.05.090

Cited by 42 publications

(26 citation statements)

References 59 publications

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“…1d), which is similar with the particle size in the Au/ In addition, two XPS sets were found at 795.1 and 780.0 eV with an energy difference of $15.1 eV, which corresponds to Co 2p 1/2 and Co 2p 3/2 spin-orbit-split doublet peak of Co 3 O 4 spinel. [33][34][35][36][37] The Co 2p 3/2 peak of 780.0 eV is tted and deconvoluted into two peaks of 780.8 and 779.2 eV (Fig. 2b and e), which is attributed to Co 2+ and Co 3+ species, respectively.…”

Section: Resultsmentioning

confidence: 99%

Investigation of Au/Co₃O₄nanocomposites in glycol oxidation by tailoring Co₃O₄morphology

et al. 2021

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Section: Resultsmentioning

confidence: 99%

Investigation of Au/Co₃O₄nanocomposites in glycol oxidation by tailoring Co₃O₄morphology

et al. 2021

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“…However, the reduction peak temperature of Ce 0.8 Zr 0.2 O 2 -S is higher than that of Ce 0.8 Zr 0.2 O 2 -C; therefore the oxidation activity of Ce 0.8 Zr 0.2 O 2 -C catalyst is better at low temperature. 35 In conclusion, the Ce 0.8 Zr 0.2 O 2 -C catalyst can provide more oxygen species to participate in the catalytic oxidation reaction at lower temperatures, which may show a better catalytic purification effect in the carbon particle catalytic purification reaction. 36 This result is also consistent with the results of catalyst activity tests.…”

Section: Resultsmentioning

confidence: 86%

Preparation of Ce_xZr_1–xO₂ by Different Methods and Its Catalytic Oxidation Activity for Diesel Soot

et al. 2022

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Novel Ce x Zr 1– x O 2 ( x = 0.67, 0.8, 0.9, 1.0) catalysts were designed and synthesized by solvothermal, calcination, and sol–gel methods and were used to catalyze oxidation of soot from diesel vehicle exhaust. The influence of catalysts synthesized by different methods and Ce/Zr molar ratios on the performance was investigated. These catalysts were characterized by XRD, N 2 adsorption–desorption, FT-IR, TEM, XPS, H 2 -temperature programmed reduction (TPR), and O 2 -temperature programmed desorption (TPD) techniques. The results indicated that Ce 0.8 Zr 0.2 O 2 prepared by the calcination method has excellent activity and stability at low temperature. The soot ignition point is 322 °C, and the ratio of soot conversion reaches 90% at 497 °C, which is lower than that from the solvothermal and sol–gel methods. The XRD, Raman, SEM, XPS and H 2 -TPR results reveal that the structure and oxygen adsorption properties are crucial to soot oxidation activity, and Zr 4+ is successfully doped into the CeO 2 lattice and forms a homogeneous solid solution. Nanostructured Ce 0.8 Zr 0.2 O 2 with 110.2 m 2 /g surface areas is produced. The proportion of chemical oxygen and surface adsorbed oxygen in the catalyst prepared from the calcination method is the highest at 23.18%. The structure may lead to charge imbalance, unsaturated bonds, and oxygen vacancies, thus increasing the adsorption of oxygen on the catalyst surface.

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“…In Fig 2e, the XPS peak in O1s region has been split into two major parts with O ads (531.8 ev) and O latt (530.1 eV) representing surface adsorbed active oxygen and lattice oxygen, respectively. 58,59 The peak intensity of O ads in 7:3 Mn-Ce is higher than pure CeO 2 , indicating the increased concentrations or number of oxygen vacancies. 50,[60][61][62] According to the fitting information in XPS peak software, the concentrations of Ce 3+ in 7:3 Mn-Ce and pure CeO 2 were calculated to be 14.4% and 8.2%, respectively.…”

Section: Morphological and Structural Propertiesmentioning

confidence: 99%

Fabrication of Mn-Ce Bimetallic Oxides as Electrode Material for Supercapacitors with High Performance

Zhou

Han

et al. 2021

Journal of Elec Materi

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Manganese and cerium (Mn-Ce) oxides were prepared under nitrogen and high-temperature oxidation via a bath precipitation method as materials for electrode assemblies in supercapacitors. The prepared Mn-Ce oxide composite was demonstrated to have a high specific capacitance of 163.7 F g À1 with 78.4% cyclic stability after 3000 cycles at a current density of 1 A g À1 . Electrochemical impedance spectroscopy confirms that MnO 2 improves the conductivity of CeO 2 . Results from XPS analysis suggest that the introduction of MnO 2 enhances the concentrations of oxygen vacancies. Finally, band structure, density of states and Mulliken population were calculated using density functional theory, and the findings are consistent with the experimental and characterization results. Because of their excellent performances, Mn-Ce bimetallic oxides are promising electrode materials for supercapacitors.

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Highly improved soot combustion performance over synergetic MnxCe1−xO2 solid solutions within mesoporous nanosheets

Cited by 42 publications

References 59 publications

Investigation of Au/Co₃O₄nanocomposites in glycol oxidation by tailoring Co₃O₄morphology

Investigation of Au/Co₃O₄nanocomposites in glycol oxidation by tailoring Co₃O₄morphology

Preparation of Ce_xZr_1–xO₂ by Different Methods and Its Catalytic Oxidation Activity for Diesel Soot

Fabrication of Mn-Ce Bimetallic Oxides as Electrode Material for Supercapacitors with High Performance

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Highly improved soot combustion performance over synergetic MnxCe1−xO2 solid solutions within mesoporous nanosheets

Cited by 42 publications

References 59 publications

Investigation of Au/Co3O4nanocomposites in glycol oxidation by tailoring Co3O4morphology

Investigation of Au/Co3O4nanocomposites in glycol oxidation by tailoring Co3O4morphology

Preparation of CexZr1–xO2 by Different Methods and Its Catalytic Oxidation Activity for Diesel Soot

Fabrication of Mn-Ce Bimetallic Oxides as Electrode Material for Supercapacitors with High Performance

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Investigation of Au/Co₃O₄nanocomposites in glycol oxidation by tailoring Co₃O₄morphology

Investigation of Au/Co₃O₄nanocomposites in glycol oxidation by tailoring Co₃O₄morphology

Preparation of Ce_xZr_1–xO₂ by Different Methods and Its Catalytic Oxidation Activity for Diesel Soot