Factors determining gasoline soot abatement over CeO2–ZrO2-MnO  catalysts under low oxygen concentration condition

Yao, Peng; He, Jishuang; Jiang, Xue; Jiao, Yi; Wang, Jianli; Chen, Yaoqiang

doi:10.1016/j.joei.2019.05.005

Cited by 16 publications

(10 citation statements)

References 63 publications

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“…An interesting phenomenon pertinent to composite manganese-based oxides is the synergy between manganese and the doped elements. In general, metal catalysts have three synergistic mechanisms: electronic interactions, surface transport of adsorbates, and intense interactions with support metals. , By controlling the interfacial chemistry, metal oxide composites could possess remarkable redox and catalytic properties. , Jampaiah et al examined the importance of different Mn 3 O 4 loadings on soot combustion by synthesizing flower-like microspheres, such as pure (CeO 2 ) 10%Mn 3 O 4 /CeO 2 , 20%Mn 3 O 4 /CeO 2 , and 40%Mn 3 O 4 /CeO 2 . As shown in Figure , the 20%Mn 3 O 4 /CeO 2 microspheres (MSs) exhibited maximum soot combustion at 381 °C (T 50 ), much lower than the values in the individual Mn 3 O 4 or CeO 2 case, indicating the existence of a synergistic influence between Mn 3 O 4 and CeO 2 .…”

Section: Soot Oxidation Activity Over Manganese Oxide-based Catalystsmentioning

confidence: 99%

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Manganese Oxide-Based Catalysts for Soot Oxidation: A Review on the Recent Advances and Future Directions

Khaskheli

Liu

2022

Energy Fuels

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Soot particles generated by combustion engines, such as gasoline direct injection engines (GDIs) and diesel engines, must be removed from the exhaust to meet the tightened emissions standards. The particulate filters with coated catalysts are common and successful techniques for the oxidation and removal of soot, during which the catalytic performance of the used catalyst plays a critical role. This review aims to discuss the soot oxidation behavior using manganese oxides as catalysts considering their beneficial natures of high catalytic oxidation activities, cost effectiveness, and environmental friendliness. This review begins with a brief discussion on how the various influential factors (e.g., soot composition, soot–catalyst mixing ratios, contact conditions, and gaseous reactions) could affect the soot catalyst activities. After that, a detailed introduction to various kinds of manganese oxide-based catalysts, including pure manganese oxides and types of perovskites, composites, and mixed, as well as manganese oxides decorated by nanoparticles or doped with metals, was provided, with the focus on the catalytic performances of each kind of catalyst and the catalytic mechanisms. The thermal stabilities of different manganese oxide-based catalysts were then briefly introduced. Finally, remarkable results and interesting findings were summarized, which are expected to provide valuable guidance for the synthesis, design, and performance optimization of manganese oxide-based catalysts for soot catalytic combustion.

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Section: Soot Oxidation Activity Over Manganese Oxide-based Catalystsmentioning

confidence: 99%

“…Soot-TG test of the samples under reaction conditions of 0.5% O 2 /N 2 for (a) without catalyst and with catalyst under (b) tight contact and (c) loose contact condition. Reproduced with permission from ref . Copyright 2020, Elsevier B.V.…”

Section: Soot Oxidation Activity Over Manganese Oxide-based Catalystsmentioning

confidence: 99%

Manganese Oxide-Based Catalysts for Soot Oxidation: A Review on the Recent Advances and Future Directions

Khaskheli

Liu

2022

Energy Fuels

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“…As shown by the Raman and in situ DRIFTS results, both active O2 -and O2 2-were generated on the CuO/La2Sn2O7 catalysts. Therefore, the O 1s spectra were fitted to three peak components corresponding to O2 -(532.6-532.9 eV), O2 2-(531.4-531.6 eV), and O 2-(529.7-529.9 eV) [56,57].…”

Section: Xps Studiesmentioning

confidence: 99%

“…In this figure, good and consistent correlations can be seen, and samples having more surface active oxygen anions/sites usually exhibit better soot combustion activity. Therefore, the quantity of surface O2 -and O2 2-determines the soot combustion activity of the CuO/La2Sn2O7 catalysts [57,58]. In addition, Fig.…”

Section: Samplesmentioning

confidence: 99%

Stable CuO/La2Sn2O7 catalysts for soot combustion: Study on the monolayer dispersion behavior of CuO over a La2Sn2O7 pyrochlore support

Feng

et al. 2021

Chinese Journal of Catalysis

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“…The incorporation of Mn into ceria/zirconia systems was also evaluated. Yao et al [41] studied CeO 2 -ZrO 2 -MnO x mixed oxides with different MnO x content (0, 10, 15, and 100 wt%), synthesized by co-precipitation method. The structural and redox properties of the mixed oxides were investigated by means of XRD, BET, H 2 -TPR, O 2 -storage capacity, O 2 -TPD, Raman, and XPS measurements.…”

Section: Ceria-based Catalysts For Gasoline Soot Oxidationmentioning

confidence: 99%

Catalytic Materials for Gasoline Particulate Filters Soot Oxidation

Matarrese

2021

Catalysts

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The energy efficiency of Gasoline Direct Injection (GDI) engines is leading to a continuous increase in GDI engine vehicle population. Consequently, their particulate matter (soot) emissions are also becoming a matter of concern. As required for diesel engines, to meet the limits set by regulations, catalyzed particulate filters are considered as an effective solution through which soot could be trapped and burnt out. However, in contrast to diesel application, the regeneration of gasoline particulate filters (GPF) is critical, as it occurs with almost an absence of NOx and under oxygen deficiency. Therefore, in the recent years it was of scientific interest to develop efficient soot oxidation catalysts that fit such particular gasoline operating conditions. Among them ceria- and perovskite-based formulations are emerging as the most promising materials. This overview summarizes the very recent academic contributions focusing on soot oxidation materials for GDI, in order to point out the most promising directions in this research area.

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Factors determining gasoline soot abatement over CeO2–ZrO2-MnO catalysts under low oxygen concentration condition

Cited by 16 publications

References 63 publications

Manganese Oxide-Based Catalysts for Soot Oxidation: A Review on the Recent Advances and Future Directions

Manganese Oxide-Based Catalysts for Soot Oxidation: A Review on the Recent Advances and Future Directions

Stable CuO/La2Sn2O7 catalysts for soot combustion: Study on the monolayer dispersion behavior of CuO over a La2Sn2O7 pyrochlore support

Catalytic Materials for Gasoline Particulate Filters Soot Oxidation

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