Nano-crystalline Ceria Catalysts for the Abatement of Polycyclic Aromatic Hydrocarbons

Garcı́a, Tomás; Solsona, Benjamín; Taylor, Stuart Hamilton

doi:10.1007/s10562-005-8689-2

Cited by 64 publications

(55 citation statements)

References 30 publications

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“…In previous work, cerium oxide has shown high activity for the total oxidation of naphthalene, and it is comparable to results reported using noble metal-based catalysts [12,13]. Additionally, the preparation method of CeO 2 , including variables such as type and quantities of reactants, type of reaction, calcination temperature and time, have proved to strongly influence the final properties and hence activity of the CeO 2 catalyst [13,14]. Therefore, it is interesting to investigate the activity of CeO 2 prepared by new synthesis routes.…”

Section: Introductionsupporting

confidence: 85%

Total Oxidation of Naphthalene Using Mesoporous CeO2 Catalysts Synthesized by Nanocasting from Two Dimensional SBA-15 and Three Dimensional KIT-6 and MCM-48 Silica Templates

et al. 2009

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Ceria catalysts have been prepared by a nanocasting procedure using SBA-15, MCM-48 and KIT-6 silica-based templates, and investigated for the total oxidation of naphthalene. In all cases cubic fluorite CeO 2 was prepared, and the structure of the template was replicated when SBA-15 and MCM-48 were used. The KIT-6 template was not replicated by the nanocasting synthesis, but in all cases mesoporous CeO2 was obtained with high surface areas (91-190 m 2 g -1 ). All of the catalysts demonstrated high activity for naphthalene oxidation to CO 2 , and the most active was the catalyst prepared from the KIT-6 template. The high activity was attributed to the small crystallite size of the CeO 2 , combined with high surface area and the highly accessible catalyst surface.

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Section: Introductionsupporting

confidence: 85%

Total Oxidation of Naphthalene Using Mesoporous CeO2 Catalysts Synthesized by Nanocasting from Two Dimensional SBA-15 and Three Dimensional KIT-6 and MCM-48 Silica Templates

et al. 2009

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“…Applications of ceria include fields such as catalysis, oxygen sensors, electrolyte materials of solid oxide fuel cells and biomedical science [1][2][3][4]. Ceria plays a prominent role in the three-way catalysis for the control of emission of automotive exhaust gases.…”

Section: Introductionmentioning

confidence: 99%

Investigation of size dependency on lattice strain of nanoceria particles synthesised by wet chemical methods

Kurian¹,

Kunjachan²

2014

Int Nano Lett

104

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An investigation of the influence of synthesis conditions on the crystallite size, lattice parameter and lattice strain of ceriumdioxide nanoparticles synthesised by coprecipitation and sol-gel processes is presented. The effect of initial precursors, precipitation and calcination temperatures, aging time and molar concentrations of precursor solution on particle size and lattice parameter has been studied. The physicochemical characterisation was performed using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX), and thermal analysis (TG-DTA). XRD profile indicates the presence of cubic fluorite-structured nanoceria particles. The average crystallite size of the samples determined by Debye-Scherrer formula ranges from 4.2 to 36.9 nm. Lattice parameters vary from 5.37 to 5.44 Å . Lattice strain of the samples was analysed using Williamson-Hall analysis since these relate to imperfections and distortions in the crystal structure. It is found that ceria reduces strain by lattice expansion which is pronounced in lower dimensions.

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“…There have been relatively few studies in the literature concentrating on the catalytic oxidation of PAHs. The oxidation of naphthalene, a model PAH, and naphthalene-containing mixtures has been attempted over metal oxide and metal-supported catalysts [5][6][7][8][9][10][11][12]. A review of these studies reveals that Pt/c-Al 2 O 3 is so far amongst the best catalysts reported for naphthalene total oxidation.…”

Section: Introductionmentioning

confidence: 99%

Naphthalene oxidation over vanadium-modified Pt catalysts supported on γ-Al2O3

2006

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Alumina-supported platinum catalysts modified by vanadium were synthesised and tested for the complete oxidation of naphthalene. The catalysts were characterised by BET, pulsed CO chemisorption, powder X-ray diffraction, laser Raman spectroscopy and temperature-programmed reduction. Whilst BET and CO chemisorption results showed that the addition of vanadium modified both the textural properties of the support and the distribution of Pt, XRD and TPR data suggested the presence of V 2 O 5 on catalysts with higher V loadings. TPR data showed that the concentration of V 2 O 5 and possibly some other vanadium species increased as the V loading increased. Only 0.5%V was found to promote the activity of the 0.5%Pt/c-Al 2 O 3 catalyst. The activity enhancement has been related to the presence of a more easily reducible vanadium species coupled with the enhanced number of surface Pt sites. On the other hand, the reduced activity demonstrated by catalysts with higher vanadium content (1 -12%) has been attributed to the presence of crystalline V 2 O 5 .

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Nano-crystalline Ceria Catalysts for the Abatement of Polycyclic Aromatic Hydrocarbons

Cited by 64 publications

References 30 publications

Total Oxidation of Naphthalene Using Mesoporous CeO2 Catalysts Synthesized by Nanocasting from Two Dimensional SBA-15 and Three Dimensional KIT-6 and MCM-48 Silica Templates

Total Oxidation of Naphthalene Using Mesoporous CeO2 Catalysts Synthesized by Nanocasting from Two Dimensional SBA-15 and Three Dimensional KIT-6 and MCM-48 Silica Templates

Investigation of size dependency on lattice strain of nanoceria particles synthesised by wet chemical methods

Naphthalene oxidation over vanadium-modified Pt catalysts supported on γ-Al2O3

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