Fabrication of perovskite-type macro/mesoporous La1-xKxFeO3-δ nanotubes as an efficient catalyst for soot combustion

Fan, Fang; Feng, Nengjie; Wang, Lei; Meng, Jie; Li, Geng; Zhao, Peng; Gao, Pengfei; Ding, Jing; Wan, Hui; Guan, Guofeng

doi:10.1016/j.apcatb.2018.05.030

Cited by 142 publications

(58 citation statements)

References 51 publications

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“…The O 1s XPS spectra are deconvoluted to two oxygen species: peaks at 529.1-529.3 eV are characteristic of surface lattice oxygen (denoted as Olat) and signals at 531.1-531.3 eV can be ascribed to oxygen adsorbed on perovskite surface (denoted as Oads) [73,74] (Fig. 5b).…”

Section: Surface Propertiesmentioning

confidence: 99%

Co-doped LaAlO3 perovskite oxide for NOx-assisted soot oxidation

Tran

Martinović

Ceretti

et al. 2020

Applied Catalysis A: General

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In the framework of nowadays challenges in the automotive catalysis, directed to the mitigation of pollution caused by the emissions of internal combustion engines, a series of LaAl1-xCoxO3 perovskites were investigated with the purpose of enhancing the oxidation of soot in the presence of NOx. Perovskite oxides LaAl1-xCoxO3 (x=0; 0.25; 0.5; 0.75 and 1) were synthesized by a solgel route and characterized by different methods: X-Ray diffraction (XRD), H2-temperature programmed reduction (H2-TPR), N2-sorption, O2/NOx-temperature programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS). The perovskite oxides were tested as catalysts for NO oxidation in isothermal mode and for NOx-assisted soot oxidation in temperature programmed reaction. Structural results reveal that Co is well incorporated in the perovskite structure expanding the unit cell, and doping Co may result in the distortion of the BO6 octahedra of the general ABO3 perovskite structure. An increase in Co substitution with x up to 0.75 remarkably promotes the oxidation activity, whereas total replacement of Al by Co degrades the catalytic performance. Among the prepared solids, LaAl0.25Co0.75O3 is the most active for NO oxidation, with a conversion of 78% at 320 °C, and it also exhibits the highest activity for NOxassisted soot oxidation, with a T10% of 377 °C while maintaining high NO2 production (71%). The outstanding performance of LaAl0.25Co0.75O3 is associated with the high mobility of lattice oxygen species and the role of surface adsorbed oxygen seems not to be prominent. The strong correlation of catalytic activity with NOx-TPD profiles suggests that NOx adsorption on catalyst surface is an essential step in soot oxidation. It is also shown that higher calcination temperature promotes the crystallinity of perovskite phase and leads to the improvement in the catalytic activity. The present work indicates that the prepared perovskite catalysts are competitive with noble-metal rivals for NOx-assisted soot oxidation and outperform them in NO2 production for further NOx abatement.

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Section: Surface Propertiesmentioning

confidence: 99%

Co-doped LaAlO3 perovskite oxide for NOx-assisted soot oxidation

Tran

Martinović

Ceretti

et al. 2020

Applied Catalysis A: General

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“…Feng等 [156] 制备了具有三维有序大孔图 11 3DOM K/La 0.8 Ce 0.2 Mn 0.6 Fe 0.4 O 3 催化剂催化炭烟颗粒燃烧的稳定性测试结果 [150] (网络版彩图) 图 12 双功能催化剂Pr 0.5 Ba 0.5 Mn 0.9 Co 0.1 O 3 的结构示意图(a) 和催化炭烟颗粒燃烧的反应机理图(b) [152] (网络版彩图) Figure 12 Fabrication schematic of bifunctional catalysts Pr 0.5 Ba 0.5 -Mn 0.9 Co 0.1 O 3 (a) and reaction mechanism for soot combustion (b) [152] (color online). [61,115,158] (网络版彩图)…”

Section: Mn基钙钛矿氧化物催化剂unclassified

Research progress of the preparation of perovskite oxide catalysts and their catalytic performances for soot combustion

Peng

Wang

et al. 2020

Sci. Sin.-Chim

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“…(2) Perovskite materials were considered as promising catalysts candidates for soot oxidation. This is because of their good redox property, high oxygen mobility and thermostability [58,59]. Moreover, in this specific form of heterogeneous catalysis, contact between the catalyst and the soot particles is a key factor.…”

Section: Soot Combustionmentioning

confidence: 99%

Three-dimensionally ordered macroporous perovskite materials for environmental applications

Zhang

Zhao

Liu

et al. 2019

Chinese Journal of Catalysis

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Three-dimensionally ordered macroporous (3DOM) perovskite materials have attracted the interest from researchers worldwide due to their unique macroporous structure, flexible composition, tailorable physicochemical property, high stability and biocompatibility. In particular, they were widely used in environmental field, such as photocatalysis, catalytic combustion, catalytic oxidation and sensors. In this review, the recent progresses in the synthesis of 3DOM perovskite materials and their environmental applications are summarized. The advantages and the promoting mechanisms of 3DOM perovskite materials for different applications are discussed in detail. Subsequently, the challenges and perspectives on the topic are proposed.

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Fabrication of perovskite-type macro/mesoporous La1-xKxFeO3-δ nanotubes as an efficient catalyst for soot combustion

Cited by 142 publications

References 51 publications

Co-doped LaAlO3 perovskite oxide for NOx-assisted soot oxidation

Co-doped LaAlO3 perovskite oxide for NOx-assisted soot oxidation

Research progress of the preparation of perovskite oxide catalysts and their catalytic performances for soot combustion

Three-dimensionally ordered macroporous perovskite materials for environmental applications

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