Preparation of Copper Oxide with High Surface Area Associated with Mesoporous Silica

Suh, Myung-Ji; Ihm, Son‐Ki

doi:10.1007/s11244-010-9471-2

Cited by 15 publications

(12 citation statements)

References 36 publications

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“…Supported copper nanoparticles are widely applied because of their high activity in reactions such as hydrogenation of aldehydes and dehydrogenation of alcohols, 1À8 toluene oxidation, 9 water-gas shift reaction, 10,11 hydrogenolysis of esters, 12,13 and production of methanol from synthesis gas. 14À17 Copper catalysts are often prepared via coprecipitation, as high loadings can be achieved in combination with high copper dispersion and good stability.…”

Section: ' Introductionmentioning

confidence: 99%

Copper Nitrate Redispersion To Arrive at Highly Active Silica-Supported Copper Catalysts

Munnik

Wolters

Gabrielsson³

et al. 2011

J. Phys. Chem. C

121

125

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In order to obtain copper catalysts with high dispersions at high copper loadings, the gas flow rate and gas composition was varied during calcination of silica gel impregnated with copper nitrate to a loading of 18 wt % of copper. Analysis by X-ray diffraction (XRD), N2O chemisorption, and transmission electron microscopy (TEM) showed that calcination in stagnant air resulted in very large copper crystallites and a low copper surface area (12 m2·gCu –1). A moderate flow of air was sufficient to greatly enhance the copper surface area (∼90 m2·gCu –1) based on a bimodal particle size distribution of few large crystallites and a highly dispersed phase. Changing to an N2 flow resulted in similar copper surface areas compared to samples calcined in air at the same space velocity, while calcination in a 2% NO/N2 flow resulted in a relatively narrow particle size distribution peaking around 8 nm and a slightly lower copper surface area (84 m2·gCu –1). By use of SBA-15 supported samples, in situ XRD and diffuse reflectance Fourier transform infrared spectroscopy (DRIFTS) showed that the decomposition of copper nitrate in NO occurred via a highly dispersed copper hydroxynitrate phase, while decomposition in N2 or air occurred partly via copper nitrate anhydrate and partly via poorly dispersed copper hydroxynitrate. The high CuO dispersions after calcination in an N2 or air flow were ascribed to the redispersion of copper nitrate anhydrate by interaction with the OH groups of the silica support. By utilization of this redispersion, high copper dispersions on silica gel with concomitant high activities were obtained for the gas-phase hydrogenation of butanal.

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Section: ' Introductionmentioning

confidence: 99%

Copper Nitrate Redispersion To Arrive at Highly Active Silica-Supported Copper Catalysts

Munnik

Wolters

Gabrielsson³

et al. 2011

J. Phys. Chem. C

121

125

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show abstract

“…The Cu 2p3/2 peak indicated the formation of CuO (931.2 eV). A slight peak shift to a lower binding energy compared to the reference data was observed, which was related to the Cu 2p3/2 binding energy of CuO (933.4 eV) [30,42]. In Fig.…”

Section: Characterization Results Of Catalystsmentioning

confidence: 70%

Cu-doped mesoporous VOx-TiO2 in catalytic hydroxylation of benzene to phenol

Xu¹,

Jia²,

Guo³

2013

Chinese Journal of Catalysis

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“…Mou et al [166] used tripodal tridentate copper complex containing mesoporous silica to efficiently activate the methylbenzene aliphatic C-H bond and synthesize the benzyl alcohol, and benzaldehyde. Moreover, the total oxidation removal of methylbenzene could be obtained over the various metals modified mesoporous silica such as Co-MCM-41 [167], Cu-MCM-41/SBA-15 [168,169], Mn-SBA-15 [170], Fe-Ti-MCM-41 [171], Cu-Mn-MCM-14 [169], etc. Furthermore, the further oxidation of benzyl alcohol has also been noticed using the transition metal-based mesoporous silica.…”

Section: Other Oxidation Of Aromatic Derivativesmentioning

confidence: 99%

Oriented Decoration in Metal-Functionalized Ordered Mesoporous Silicas and Their Catalytic Applications in the Oxidation of Aromatic Compounds

et al. 2018

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Ordered mesoporous silicas (OMSs) attract considerable attention due to their advanced structural properties. However, for the pristine silica materials, the inert property greatly inhibits their catalytic applications. Thus, to contribute to the versatile surface of OMSs, different metal active sites, including acidic/basic sites and redox sites, have been introduced into specific locations (mesoporous channels and framework) of OMSs and the metal-functionalized ordered mesoporous silicas (MOMSs) show great potential in the catalytic applications. In this review, we first present the categories of metal active sites. Then, the synthesized processes of MOMSs are thoroughly discussed, in which the metal active sites would be introduced with the assistance of organic groups into the specific locations of OMSs. In addition, the structural morphologies of OMSs are elaborated and the catalytic applications of MOMSs in the oxidation of aromatic compounds are illustrated in detail. Finally, the prospects for the future development in this field are proposed.

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Preparation of Copper Oxide with High Surface Area Associated with Mesoporous Silica

Cited by 15 publications

References 36 publications

Copper Nitrate Redispersion To Arrive at Highly Active Silica-Supported Copper Catalysts

Copper Nitrate Redispersion To Arrive at Highly Active Silica-Supported Copper Catalysts

Cu-doped mesoporous VOx-TiO2 in catalytic hydroxylation of benzene to phenol

Oriented Decoration in Metal-Functionalized Ordered Mesoporous Silicas and Their Catalytic Applications in the Oxidation of Aromatic Compounds

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