Porous silica as supports for controlled fabrication of Au/CeO2/SiO2 catalysts for CO oxidation: Influence of the silica nanostructures

Ren, Li-Hui; Zhang, Huili; Lu, An‐Hui; Hao, Yan; Li, Wen‐Cui

doi:10.1016/j.micromeso.2012.03.010

Cited by 19 publications

(9 citation statements)

References 35 publications

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“…pore walls with layers of metallic particles in the internal channels, then a blockage of some pores happens by the further deposition of ceria and zirconia nanoparticles and finally a destruction of the internal pore walls occurs due to excessive insertion of Ce and Zr. Similar phenomenon has been observed in the literature [19].…”

Section: Accepted Manuscriptsupporting

confidence: 92%

“…The further increase of Ce and Zr loadings, leads the TPR profile of the Pd-CeZr10 sample to exhibit two positive peaks at 25°C and 105°C, which could be attributed to the reduction of more stable PdO species in strong interactions with the support [19,21,27]. A similar peak appear at higher temperature (around 160°C) on the TPR profile of the Pd-CeZr20 sample ( fig.…”

Section: 3palladium Reducibilitymentioning

confidence: 84%

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Advanced Pd/CexZr(1−x)O2/MCM-41 catalysts for methane combustion: Effect of the zirconium and cerium loadings

Saïd

Sadouki

Masse

et al. 2018

Microporous and Mesoporous Materials

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Pd/(Ce x Zr (1-x) O 2)/MCM-41 catalysts containing variable loadings of Ce and Zr with fixed molar ratio Ce/Zr=1/2 are prepared by impregnation. Synthesized MCM-41, Pd(acac) 2 , Ce(NO 3) 3 .6H 2 O and Zr(acac) 4 are used as chemicals. The effect of Ce and Zr contents on the textural, structural and catalytic properties of the prepared catalyst is studied. N 2physisorption, H 2-chimisorption, XRD, TEM-EDX and TPR are the main techniques used to characterize these catalysts. The obtained results show that Ce and Zr addition impacts differently the surface area, porosity and particle sizes of the Pd/(Ce x Zr (1-x) O 2)/MCM-41 catalysts, depending on the variable amount of Ce and Zr. A huge enhancement in the methane combustion activity is obtained.

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Section: Accepted Manuscriptsupporting

confidence: 92%

Section: 3palladium Reducibilitymentioning

confidence: 84%

Advanced Pd/CexZr(1−x)O2/MCM-41 catalysts for methane combustion: Effect of the zirconium and cerium loadings

Saïd

Sadouki

Masse

et al. 2018

Microporous and Mesoporous Materials

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“…1,3,5,21 CeO 2 shows an excellent effect on the activity of catalysts due to its outstanding oxygen storage capacity (OSC), and its influence on the dispersion and reduction/oxidation behavior of supported catalysts. We have done a series of studies on CeO 2 modified CuO based catalysts, [22][23][24][25][26] and the addition of CeO 2 promotes the activity of the catalysts towards to NO + CO reactions. TiO 2 -anatase based catalysts have received extensive interest from NO removal researches.…”

Section: Introductionmentioning

confidence: 99%

Influence of CeO₂modification on the properties of Fe₂O₃–Ti_0.5Sn_0.5O₂catalyst for NO reduction by CO

Dong

Zhang

Tang

et al. 2014

Catal. Sci. Technol.

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“…The addition of proper metal oxides such as Co 3 O 4 , CeO 2 , TiO 2 , FeO x and CuO x , onto the silica support modified the acid-base and textural properties of the silica matrix and increased the binding effect and dispersion of the supported Au-NPs, finally improved their catalytic activity [27][28][29][30][31][32][33]. The changes of chemical environment of Au nanoparticles enhanced the interaction between Au-NPs and doping metal oxides, leading to an increase of catalytic activity and resistance to sintering or aggregation during the calcination or reaction step.…”

Section: Synthesis Of Au/mesoporous Silica By Doping Oxidesmentioning

confidence: 99%

“…Regarding all these catalysts supported over promoted mesoporous silica, highly dispersed Au particles in intimate contact with the promoting active oxide are the key factors in CO oxidation activity. Moreover, the ordered pore system of the silica support may help in controlling the dispersion of the multicomponent active phase [32]. In the case of such three components systems the preferential formation of the active Au/MO x is decisive and enables the formation of more active sites compared with the bare active oxide supported Au-NPs [33].…”

Section: Synthesis Of Au/mesoporous Silica By Doping Oxidesmentioning

confidence: 99%

Mesoporous Silica Based Gold Catalysts: Novel Synthesis and Application in Catalytic Oxidation of CO and Volatile Organic Compounds (VOCs)

Pantaleo

Venezia

et al. 2013

Catalysts

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Abstract:Gold nanoparticles, particularly with the particle size of 2-5 nm, have attracted increasing research attention during the past decades due to their surprisingly high activity in CO and volatile organic compounds (VOCs) oxidation at low temperatures. In particular, CO oxidation below room temperature has been extensively studied on gold nanoparticles supported on several oxides (TiO 2 , Fe 2 O 3 , CeO 2 , etc.). Recently, mesoporous silica materials (such as SBA-15, MCM-41, MCM-48 and HMS) possessing ordered channel structures and suitable pore diameters, large internal surface areas, thermal stabilities and excellent mechanical properties, have been investigated as suitable hosts for gold nanoparticles. In this review we highlight the development of novel mesoporous silica based gold catalysts based on examples, mostly from recently reported results. Several synthesis methods are described herein. In detail we report: the modification of silica with organic functional groups; the one-pot synthesis with the incorporation of both gold and coupling agent containing functionality for the synthesis of mesoporous silica; the use of cationic gold complexes; the synthesis of silica in the presence of gold colloids or the dispersion of gold colloids protected by ligands or polymers onto silica; the modification of silica by other metal oxides; other conventional preparation methods to form mesoporous silica based gold catalysts. The gold based catalysts prepared as such demonstrate good OPEN ACCESSCatalysts 2013, 3 775 potential for use in oxidation of CO and VOCs at low temperatures. From the wide family of VOCs, the oxidation of methanol and dimethyldisulfide has been addressed in the present review.

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Porous silica as supports for controlled fabrication of Au/CeO2/SiO2 catalysts for CO oxidation: Influence of the silica nanostructures

Cited by 19 publications

References 35 publications

Advanced Pd/CexZr(1−x)O2/MCM-41 catalysts for methane combustion: Effect of the zirconium and cerium loadings

Advanced Pd/CexZr(1−x)O2/MCM-41 catalysts for methane combustion: Effect of the zirconium and cerium loadings

Influence of CeO₂modification on the properties of Fe₂O₃–Ti_0.5Sn_0.5O₂catalyst for NO reduction by CO

Mesoporous Silica Based Gold Catalysts: Novel Synthesis and Application in Catalytic Oxidation of CO and Volatile Organic Compounds (VOCs)

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Porous silica as supports for controlled fabrication of Au/CeO2/SiO2 catalysts for CO oxidation: Influence of the silica nanostructures

Cited by 19 publications

References 35 publications

Advanced Pd/CexZr(1−x)O2/MCM-41 catalysts for methane combustion: Effect of the zirconium and cerium loadings

Advanced Pd/CexZr(1−x)O2/MCM-41 catalysts for methane combustion: Effect of the zirconium and cerium loadings

Influence of CeO2modification on the properties of Fe2O3–Ti0.5Sn0.5O2catalyst for NO reduction by CO

Mesoporous Silica Based Gold Catalysts: Novel Synthesis and Application in Catalytic Oxidation of CO and Volatile Organic Compounds (VOCs)

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Influence of CeO₂modification on the properties of Fe₂O₃–Ti_0.5Sn_0.5O₂catalyst for NO reduction by CO