Catalytic oxidation of soot on mesoporous ceria-based mixed oxides with cetyltrimethyl ammonium bromide (CTAB)-assisted synthesis

Zhu, Hongjian; Xu, Jing; Yichuan, Yuge; Wang, Zhongpeng; Gao, Yibo; Liu, Wei; Yin, Henan

doi:10.1016/j.jcis.2017.07.114

Cited by 38 publications

(23 citation statements)

References 49 publications

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“…In our previous work, we have also successfully synthesized mesoporous ceria-based catalysts doped with different transition metals using CTAB as a so template. 27 Though a number of Cu-doped ceria-based catalysts have already been reported, a comparative study is necessary to determine the dependence of the mesoporous structure on the amount of dopant and the inuence of the dopant on the catalytic activity, which have not been well explored yet. In addition, a detailed investigation of the mechanism and catalytic application of doped ceria-based oxides for enhanced CO oxidation activity is still needed.…”

Section: Introductionmentioning

confidence: 99%

Catalytic oxidation of CO over mesoporous copper-doped ceria catalysts via a facile CTAB-assisted synthesis

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Catalytic oxidation of CO over mesoporous copper-doped ceria catalysts via a facile CTAB-assisted synthesis

et al. 2018

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“…The adsorption‐desorption isotherm of meso‐C could be categorized as type IV curve according to IUPAC type with a H2 hysteresis loop, the H2 type hysteresis loops with a sloping adsorption branch and a relatively steep desorption branch were observed in high P/P 0 range of 0.4‐0.8. It was concluded that meso‐C samples reflected complex pore structure, including typical inkpot‐shaped pores, tubular holes with asymmetrical distribution of pore diameter and close packing spherical particles mesopore, etc . After loading Pd−Co, the N 2 adsorption‐desorption isotherm of Pd−Co/meso‐C–DP also displayed the type‐IV curves, while the H2 type hysteresis loops transformed to the H3 type hysteresis loops at high relative pressure, indicating that the Pd−Co/meso‐C had the properties of mesoporous materials.…”

Section: Resultsmentioning

confidence: 99%

Outstanding Water‐Resistance Pd‐Co Nanoparticles Functionalized Mesoporous Carbon Catalyst for CO Catalytic Oxidation at Room Temperature

et al. 2018

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CO complete oxidation at room temperature under moisture has the key difficulty in low loading of noble metal compounds. In this paper, a series of PdÀCo functionalized mesoporous carbon-based (meso-C) catalysts were masterly designed, and meso-C support was prepared by the hard template method. PdÀCo/meso-C catalysts exhibited the high catalytic activity of CO oxidation, the superior PdÀCo/meso-C catalyst showed excellent water-resistance, which could maintain 100% conversion beyond 200 h at room temperature. Through a series of characterizations, the superior PdÀCo/meso-C catalyst pos-sessed higher activity due to smaller cobaltosic oxide (Co 3 O 4 ) particle size, excellent reducibility, abundant surface active oxygen species, higher tetravalent Pd content, etc. Therefore, it was concluded that the reaction mechanism of CO oxidation on PdÀCo/meso-C followed the Langmuir-Hinshelwood + Redox mechanism according to above characterization and activity results. The deactivation of noble metal catalyst was reasonably solved by controlling the dispersion and particle size of PdÀCo.

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“…All the hydrotalcites-derived mixed oxides showed IUPAC type IV isotherms, indicating that the hydrotalcite-like samples produced mesoporous mixed oxides after calcined at 600 °C. The H3 type of hysteresis loops indicate a capillary condensation in a high P/P0 range of 0.6-1.0 [39]. The hysteresis loop is usually found in adsorbents containing slit-shaped pores.…”

Section: N2 Adsorption-desorption Characterizationmentioning

confidence: 95%

High Performance of Mn-Doped MgAlOx Mixed Oxides for Low Temperature NOx Storage and Release

Cui

Li²,

Liu

et al. 2019

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NOx storage-reduction (NSR) is a potential approach for the effective removal of NOx under the lean conditions in lean-burn engines. Herein, manganese-doped mixed oxides (Mn/MgAlOx) with high performance for low temperature NOx storage and release were derived from hydrotalcites precursors prepared by a facile coprecipitation method. The catalysts were characterized by X-ray diffraction (XRD), SEM, N2 adsorption-desorption, H2-TPR, FT-IR, and X-ray photoelectron spectroscopy (XPS) techniques. The Mn-doped MgAlOx catalysts exhibited high NOx storage capacity (NSC) at low temperature range (150–300 °C), which was related to their increased surface area, improved reducibility and higher surface Mn3+ content. The largest NSC measured, 426 μmol/g, was observed for NOx adsorption at 200 °C on Mn15 catalyst (the sample containing 15 wt% of Mn). The in situ DRIFTS spectra of NOx adsorption proved that the Mn-doped hydrotalcite catalysts are preferred for low temperature NOx storage and release due to their ability to store NOx mainly in the form of thermally labile nitrites. NSR cycling tests revealed the NOx removal rate of Mn15 sample can reach above 70% within the wide temperature range of 150–250 °C. Besides, the influence of CO2, soot, H2O and SO2 on NOx storage performance of Mn15 catalyst was also studied. In all, owning to their excellent NOx storage capacity, NSR cycling performance, and resistance to CO2, soot, SO2 and H2O, the Mn-doped MgAlOx NSR catalysts have broad application prospects in NOx control at low temperatures.

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Catalytic oxidation of soot on mesoporous ceria-based mixed oxides with cetyltrimethyl ammonium bromide (CTAB)-assisted synthesis

Cited by 38 publications

References 49 publications

Catalytic oxidation of CO over mesoporous copper-doped ceria catalysts via a facile CTAB-assisted synthesis

Catalytic oxidation of CO over mesoporous copper-doped ceria catalysts via a facile CTAB-assisted synthesis

Outstanding Water‐Resistance Pd‐Co Nanoparticles Functionalized Mesoporous Carbon Catalyst for CO Catalytic Oxidation at Room Temperature

High Performance of Mn-Doped MgAlOx Mixed Oxides for Low Temperature NOx Storage and Release

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