Spectroscopic Analysis of Au–V-Based Catalysts and Their Activity in the Catalytic Removal of Diesel Soot Particulates

Craenenbroeck, Jeroen Van; Andreeva, D.; Tabakova, T.; Werde, Kristof Van; Mullens, J.; Verpoort, Francis

doi:10.1006/jcat.2002.3649

Cited by 42 publications

(22 citation statements)

References 31 publications

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“…Au-V-based catalysts have been studied for soot combustion with special attention to the reaction mechanism (Van Craenenbroeck et al, 2002). Gold particles do provide very active sites able to ignite soot within the desired temperature range but retard the oxidation process at high vanadium loadings because of the diminished contact.…”

Section: Non-platinum Noble Metals and Silver Catalystsmentioning

confidence: 99%

Diesel soot combustion catalysts: review of active phases

2014

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Section: Non-platinum Noble Metals and Silver Catalystsmentioning

confidence: 99%

Diesel soot combustion catalysts: review of active phases

2014

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“…However, because of limitation of intrinsic activity, 3DOM oxide-based catalysts do not show high enough activity for soot oxidation at low temperature. In order to further improve the intrinsic activity of catalysts for soot combustion, the advantages of supported noble metal (Au, Pt, Pd, Ag, etc) nanoparticles (NPs) catalysts have been recognized 12 13 . We have synthesized several kinds of 3DOM oxides-supported Au and Pt catalysts 14 .…”

mentioning

confidence: 99%

Ordered micro/macro porous K-OMS-2/SiO2 nanocatalysts: Facile synthesis, low cost and high catalytic activity for diesel soot combustion

Zhang

Wei

et al. 2017

Sci Rep

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A series of novel oxide catalysts, which contain three-dimensionally ordered macroporous (3DOM) and microporous structure, were firstly designed and successfully synthesized by simple method. In the as-prepared catalysts, 3DOM SiO2 is used as support and microporous K-OMS-2 oxide nanoparticles are supported on the wall of SiO2. 3DOM K-OMS-2/SiO2 oxide catalysts were firstly used in soot particle oxidation reaction and they show very high catalytic activities. The high activities of K-OMS-2/SiO2 oxide catalysts can be assigned to three possible reasons: macroporous effect of 3DOM structure for improving contact between soot and catalyst, microporous effect of K-OMS-2 for adsorption of small gas molecules and interaction of K and Mn for activation of gas molecules. The catalytic activities of catalysts are comparable to or even higher than noble metal catalyst in the medium and high temperature range. For example, the T50 of K-OMS-2/SiO2-50, 328 °C, is much lower than those of Pt/Al2O3 and 3DOM Au/LaFeO3, 464 and 356 °C,respectively. Moreover, catalysts exhibited high catalytic stability. It is attributed to that the K+ ions are introduced into the microporous structure of OMS-2 and stabilized in the catalytic reaction. Meanwhile, the K+ ions play an important role in templating and stabilizing the tunneled framework of OMS-2.

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“…These results of soot combustion are relevant to solidsolid-gas triple phase complex reactions. The contact between reactant soot and catalytic surface sites is often a very important factor determining reaction rate, which is substantiated by many researchers [2,9]. The difference between T ig and T m (T f ) can be taken as a measure of the nature of catalytic site vs the number of contact points between these sites and soot.…”

Section: Resultsmentioning

confidence: 99%

“…Once the ignition takes place the number of catalytic active sites in contact with soot becomes important, which determines the further combustion rate. A marked difference between T ig and T m (T f ) indicates poor contact, while a small difference indicates a very good contact between soot and catalyst [9]. The high mobility of the catalyst surface atoms can enhance the contact between catalyst and soot.…”

Section: Resultsmentioning

confidence: 99%

Study of the catalytic combustion of diesel soot over nanometric lanthanum-cobalt mixed oxide catalysts

Liu

Zhang

Chen

et al. 2005

React Kinet Catal Lett

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Co 3 O 4 , NiCo 2 O 4 and LaCo 2 O 4 catalysts were synthesized by the citric acid-ligated method. These catalysts containing Co-oxide active components can largely lower the temperature of soot combustion under tight contact conditions. Under the conditions of loose contact NiCo 2 O 4 cannot promote soot combustion, but LaCo 2 O 4 can effectively promote soot combustion because the nanometric perovskite-type catalyst LaCoO 3 produced in the LaCo 2 O 4 sample.

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Spectroscopic Analysis of Au–V-Based Catalysts and Their Activity in the Catalytic Removal of Diesel Soot Particulates

Cited by 42 publications

References 31 publications

Diesel soot combustion catalysts: review of active phases

Diesel soot combustion catalysts: review of active phases

Ordered micro/macro porous K-OMS-2/SiO2 nanocatalysts: Facile synthesis, low cost and high catalytic activity for diesel soot combustion

Study of the catalytic combustion of diesel soot over nanometric lanthanum-cobalt mixed oxide catalysts

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