Catalytic combustion of soot particulates over rare-earth substituted Ln2Sn2O7 pyrochlores (Ln = La, Nd and Sm)

Wang, Zhongpeng; Zhu, Hongjian; Ai, Lijie; Liu, Xuhui; Lv, Min; Wang, Liguo; Ma, Zhewen; Zhang, Zhaoliang

doi:10.1016/j.jcis.2016.06.010

Cited by 57 publications

(29 citation statements)

References 43 publications

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“…A larger slope is observed for Mn0 and un-catalyzed samples indicating their low catalytic activity. As shown in Table 4, the lowest E a is calculated for Mn1, which is associated with the higher O ads /O lat and Mn 3+ /Mn 4+ ratios shown in Table 2 [3]. Finally, Figure 5c shows the TGA results of all catalysts synthesized in this work.…”

Section: Resultsmentioning

confidence: 72%

“…In addition, the US-EPA has shown that soot particles are correlated with lung cancer in humans [2]. For this reason, governments around the world have been working to curb these emissions [3]. Diesel particulate filters with oxidation catalysis is, so far, the most promising technique to solve this problem.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Most perovskites, in particular SrTiO 3 , are characterized by high thermal stability, oxidative properties, and low cost, which make them good candidates for catalysts [7]. Recently, perovskites with the general structure ABO 3 , with different values of A or B, have been used as catalysts in soot oxidation reactions. Lopez-Suarez et al reported that SrTiO 3 impregnated with Cu and synthesized by the sol-gel method showed the highest catalytic activity over Cu/MgTiO 3 and other supports, decreasing the combustion temperature by approximately 10%.…”

Section: Introductionmentioning

confidence: 99%

“…Later, the same group reported that lattice copper in SrTiCuO 3 promotes the NO x chemisorption and oxidation capacity which is associated with the best catalytic activity during soot oxidation decreasing the combustion temperature by approximately 30% comparing the uncatalyzed reaction [9]. Feng et al reported the doping by Ce and Co in LaFeO 3 . They observed an increase in the redox property by adding 6 at % of Ce in A site and 12 at % Co in B site.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Dopant Loading on the Structural and Catalytic Properties of Mn-Doped SrTiO3 Catalysts for Catalytic Soot Combustion

et al. 2018

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Soot particles have been associated with respiratory diseases and cancer. To decrease these emissions, perovskite-mixed oxides have been proposed due to their thermal stability and redox surface properties. In this work, SrTiO 3 doped with different amounts of Mn were synthesized by the hydrothermal method and tested for soot combustion. Results show that at low Mn content, structural distortion, and higher O ads /O lat ratio were observed which was attributed to the high content of Mn 3+ in Ti sites. On the other hand, increasing the Mn content led to surface segregation of manganese oxide. All synthesized catalysts showed mesopores in the range of 32-47 nm. In the catalytic combustion of soot, the samples synthesized in this work lowered the combustion temperature by more than 100 • C compared with the uncatalyzed reaction. The sample doped with 1 wt % of Mn showed the best catalytic activity. The activation energy of these samples was also calculated, and the order of decreasing activation energy is as follows: uncatalyzed > Mn0 > Mn8 > Mn4 > Mn1. The best catalytic activity for Mn1 was attributed to its physicochemical properties and the mobility of the oxygen from the bulk to the surface at temperatures higher than 500 • C.

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Section: Resultsmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Dopant Loading on the Structural and Catalytic Properties of Mn-Doped SrTiO3 Catalysts for Catalytic Soot Combustion

et al. 2018

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Highly Controllable Hydrogenative Ring Rearrangement and Complete Hydrogenation Of Biobased Furfurals over Pd/La₂B₂O₇ (B=Ti, Zr, Ce)

Tong

Gao

et al. 2021

ChemCatChem

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Developing a highly selective catalyst to upgrade furfurals (5hydroxymethyl furfural and furfural) to cyclopentanones (3hydroxymethyl cyclopentanone and cyclopentanone) and tetrahydrofuran alcohols (2,5-bishydroxymethyl tetrahydrofuran and tetrahydrofuran alcohol) is highly significant for biobased fine chemical synthesis. Here, a series of La 2 B 2 O 7 (B=Ti, Zr, Ce) metal oxides, featuring the same chemical formula but different topological structures are fabricated. After Pd loading, the Lewis acidity and metal-support interaction are well governed by the support type, which further affects the hydrogenation and acid-catalyzed ability. A greater than 82 % yield of cyclopentanones is obtained via a hydrogenative ring rearrangement route over Pd/La 2 Ti 2 O 7 . However, Pd/La 2 Ce 2 O 7 shows high catalytic efficiency for tetrahydrofuran alcohols with an approximately 80 % yield via a complete hydrogenation route. Additionally, the catalyst exhibits outstanding recycling performance and structural stability. This study presents an interesting design strategy for the selective preparation of cyclopentanones and tetrahydrofuran alcohols through the regulation of the adsorption mechanism.

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Research Advances in Rare Earth Oxide‐Based Catalysts for Soot Combustion

Ma,

Guo,

Xiong

et al. 2024

ChemCatChem

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Environmental issues exert a significant influence on the human life. Soot particles have attracted attention as a major source of pollution. Significant progress has been made in the research of efficient soot combustion catalysts. The distinctive bonding properties on the 4f orbitals of rare earth elements exhibit excellent catalytic performance for soot combustion. This comprehensive review explores recent advancements in the design of catalysts based on rare earth oxides, with a specific focus on various catalytic materials (La‐based, Ce‐based, Pr‐based and other rare earth elements), synthesis methods, catalyst morphology, catalytic performance and the intricate mechanisms governing their performance in catalytic soot combustion. The activity and selectivity of different rare earth catalysts in various reaction atmospheres are also summarized in the article. Finally, the challenges associated with rare earth oxide‐based catalysts and their potential for future development in the soot combustion are highlighted. This review establishes a fundamental basis for the further design of catalytic materials that exhibit enhanced efficiency and stability.

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Catalytic combustion of soot particulates over rare-earth substituted Ln2Sn2O7 pyrochlores (Ln = La, Nd and Sm)

Cited by 57 publications

References 43 publications

Effect of Dopant Loading on the Structural and Catalytic Properties of Mn-Doped SrTiO3 Catalysts for Catalytic Soot Combustion

Effect of Dopant Loading on the Structural and Catalytic Properties of Mn-Doped SrTiO3 Catalysts for Catalytic Soot Combustion

Highly Controllable Hydrogenative Ring Rearrangement and Complete Hydrogenation Of Biobased Furfurals over Pd/La₂B₂O₇ (B=Ti, Zr, Ce)

Research Advances in Rare Earth Oxide‐Based Catalysts for Soot Combustion

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Catalytic combustion of soot particulates over rare-earth substituted Ln2Sn2O7 pyrochlores (Ln = La, Nd and Sm)

Cited by 57 publications

References 43 publications

Effect of Dopant Loading on the Structural and Catalytic Properties of Mn-Doped SrTiO3 Catalysts for Catalytic Soot Combustion

Effect of Dopant Loading on the Structural and Catalytic Properties of Mn-Doped SrTiO3 Catalysts for Catalytic Soot Combustion

Highly Controllable Hydrogenative Ring Rearrangement and Complete Hydrogenation Of Biobased Furfurals over Pd/La2B2O7 (B=Ti, Zr, Ce)

Research Advances in Rare Earth Oxide‐Based Catalysts for Soot Combustion

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Product

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Highly Controllable Hydrogenative Ring Rearrangement and Complete Hydrogenation Of Biobased Furfurals over Pd/La₂B₂O₇ (B=Ti, Zr, Ce)