Preferential carbon monoxide oxidation on Ag/Al-SBA-15 catalysts: Effect of the Si/Al ratio

Zhang, Xiaodong; Han, Dong; Gu, Zhenglin; Wang, Guan; Zuo, Yuanhui; Wang, Yangang; Cui, Lifeng

doi:10.1016/j.cej.2015.01.085

Cited by 58 publications

(25 citation statements)

References 43 publications

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“…Supported noble metal catalysts have been proven very effective in low temperature CO oxidation reaction and selective CO oxidation [23][24][25][26][27]. There are many factors affecting its catalytic activity; e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Ordered mesoporous silica and heteroatoms incorporated mesoporous silica materials are both considered a good catalyst support with large surface area and well-defined pore size [1,4,26,28,29]. Recently, Al incorporated mesoporous silica materials (aluminosilicate) with acidic and defect sites have attracted great attention [4,26].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Al incorporated mesoporous silica materials (aluminosilicate) with acidic and defect sites have attracted great attention [4,26]. A variety of Ag species supported on mesoporous silica and aluminosilicate supports have been studied for http://dx.doi.org/10.1016/j.cej.2015.08.064 1385-8947/Ó 2015 Elsevier B.V. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%

“…It is found that Ag/silica catalysts show excellently high activity in CO oxidation at room temperature [6,9]. Further studies indicated that the incorporation of Al in SBA-15 has positive effect on the structural and textural characteristics of catalysts [4,26]. A large number of Al atoms are introduced into mesoporous frameworks of SBA-15 using ''pH-adjusting" method with aluminum isopropoxide [4] and Al 2 (SO 4 ) 3 Á18H 2 O [26] as alumina sources.…”

Section: Introductionmentioning

confidence: 99%

“…Further studies indicated that the incorporation of Al in SBA-15 has positive effect on the structural and textural characteristics of catalysts [4,26]. A large number of Al atoms are introduced into mesoporous frameworks of SBA-15 using ''pH-adjusting" method with aluminum isopropoxide [4] and Al 2 (SO 4 ) 3 Á18H 2 O [26] as alumina sources. The catalytic performance for CO oxidation [4] and selective CO oxidation [26] of Ag/ Al-SBA-15 catalyst were investigated, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Study of catalytic activity at the Ag/Al-SBA-15 catalysts for CO oxidation and selective CO oxidation

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Section: Introductionmentioning

confidence: 99%

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Section: Introductionmentioning

confidence: 99%

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Study of catalytic activity at the Ag/Al-SBA-15 catalysts for CO oxidation and selective CO oxidation

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Encapsulation of N‐heterocyclic carbene–gold (I) catalysts within magnetic core/shell silica gels: A reusable alkyne hydration catalyst

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2020

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In this study, N‐heterocyclic carbene–Au(I) complex, chloro[1,3‐bis(2,6‐diisopropylphenyl)imidazol‐2‐ylidene]gold (I), was successfully encapsulated within mesopores of a magnetic core/shell (γ‐Fe2O3@SiO2) silica gel through post‐pore‐size reduction by silylation reactions The post‐reduction of the pore size not only minimizes the catalyst leaching during the alkyne hydration reactions but also eliminates any need for covalent modification of the catalyst or support surface. The resulting catalyst exhibits high activity in hydration reactions of various alkynes even under low catalytic loadings. The catalyst can be easily recycled from the reaction mixture using a magnet and can be reused in alkyne hydration reactions up to six times with only 52. wt% Au leaching.

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Synthesis and characterization of mesoporous organosilica supported palladium (SBA‐Pr‐NCQ‐Pd) as an efficient nanocatalyst in the Mizoroki–Heck coupling reaction

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Ziarani

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et al. 2020

Applied Organom Chemis

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In the present study, the modification of a mesoporous organosilica nanocomposite SBA‐15 (Santa Barbara Amorphous 15) was carried out in two steps, first through the surface functionalization of SBA‐Pr‐NH2 with 2‐chloroquinoline‐3‐carbaldehyde to form SBA‐Pr‐NCQ, and then through a post‐modification process with palladium ions. The target nanocompound structure of SBA‐Pr‐NCQ‐Pd was characterized by different techniques (thermogravimetric analysis, X‐ray diffraction, scanning electron microscopy, Energy‐dispersive X‐ray spectroscopy (EDX), and Fourier transform infrared spectroscopy). The catalytic performance of the porous inorganic–organic hybrid nanocomposite (SBA‐Pr‐NCQ‐Pd) in one of the most important carbon–carbon bond‐forming processes, the Mizoroki–Heck coupling reaction of aryl halides and methacrylate in water/ethanol media, was examined. Compared to previous reports, this protocol afforded some advantages, such as high yields of products, short reaction times, catalyst stability without leaching, simple methodology, easy workup, and greener conditions. Also, the nanocatalyst can be easily separated from the reaction mixture and reused several times without a significant decrease in activity and promises economic as well as environmental benefits.

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Preferential carbon monoxide oxidation on Ag/Al-SBA-15 catalysts: Effect of the Si/Al ratio

Cited by 58 publications

References 43 publications

Study of catalytic activity at the Ag/Al-SBA-15 catalysts for CO oxidation and selective CO oxidation

Study of catalytic activity at the Ag/Al-SBA-15 catalysts for CO oxidation and selective CO oxidation

Encapsulation of N‐heterocyclic carbene–gold (I) catalysts within magnetic core/shell silica gels: A reusable alkyne hydration catalyst

Synthesis and characterization of mesoporous organosilica supported palladium (SBA‐Pr‐NCQ‐Pd) as an efficient nanocatalyst in the Mizoroki–Heck coupling reaction

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