Au@ZIF-8: CO Oxidation over Gold Nanoparticles Deposited to Metal−Organic Framework

Jiang, Hai‐Long; Liu, Bo; Akita, Tomoki; Haruta, Masatake; Sakurai, Hiroaki; Xu, Qiang

doi:10.1021/ja9047653

Cited by 793 publications

(506 citation statements)

References 37 publications

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“…[1][2][3][4][5][6] Catalytic activity of the supported catalyst is dependent on not only the size of metal NPs but also the metal-support interaction. [7][8][9][10][11][12][13] Strong metal-support interaction in which metals are anchored on active transition metal oxides such as TiO 2 , 14-19 CeO 2 , 20-24 and Fe 2 O 3 25-27 provides high activity for several reactions such as hydrogenation, [28][29][30] CO oxidation, [31][32][33][34][35] and water-gas shift reaction. [36][37][38][39] The underlying origin of the metal-support interaction and the promotional role of the active oxide supports in enhancing the catalytic activity and selectivity have thus been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

Confined Pt and CoFe₂O₄Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Kang¹,

Eum²,

Lee³

et al. 2011

Bulletin of the Korean Chemical Society

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Confined Pt and CoFe 2 O 4 nanoparticles (NPs) in a mesoporous core/shell silica microsphere, Pt-CoFe 2 O 4 @meso-SiO 2 , were prepared using a bi-functional linker molecule. A large number of Pt NPs in Pt-CoFe 2 O 4 @meso-SiO 2 , ranging from 5 to 8 nm, are embedded into the shell and some of them are in close contact with CoFe 2 O 4 NPs. The hydrogenation of cyclohexene over the Pt-CoFe 2 O 4 @meso-SiO 2 microsphere at 25 o C and 1 atm of H 2 yields cyclohexane as a major product. In addition, it gives oxygenated products. Control experiments with 18O-labelled water and acetone suggest that surface-bound oxygen atoms in CoFe 2 O 4 are associated with the formation of the oxygenated products. This oxidation reaction is operative only if CoFe 2 O 4 and Pt NPs are in close contact. The Pt-CoFe 2 O 4 @meso-SiO 2 catalyst is separated simply by a magnet, which can be re-used without affecting the catalytic efficiency.

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Section: Introductionmentioning

confidence: 99%

Confined Pt and CoFe₂O₄Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Kang¹,

Eum²,

Lee³

et al. 2011

Bulletin of the Korean Chemical Society

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“…These nanoparticles were usually identified by the conventional X-ray powder diffraction. [137][138][139][140][141][142][143] Recently, the method of high-energy Xray total scattering (XTS) was employed for the investigation of low-concentration of nanoparticles within the matrix. The different amounts of Pd nanoparticles were immobilized within the MIL-101(Cr)-NH 2 material for Suzuki-Miyaura catalytic reactions.…”

Section: Catalytic Sitesmentioning

confidence: 99%

Chemistry of Metal-organic Frameworks Monitored by Advanced X-ray Diffraction and Scattering Techniques

Mazaj

Kaučič

Logar

2016

ACSi

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In the memory of Janez (Janko) Jamnik. AbstractThe research on metal-organic frameworks (MOFs) experienced rapid progress in recent years due to their structure diversity and wide range of application opportunities. Continuous progress of X-ray and neutron diffraction methods enables more and more detailed insight into MOF's structural features and significantly contributes to the understanding of their chemistry. Improved instrumentation and data processing in high-resolution X-ray diffraction methods enables the determination of new complex MOF crystal structures in powdered form. By the use of neutron diffraction techniques, a lot of knowledge about the interaction of guest molecules with crystalline framework has been gained in the past few years. Moreover, in-situ time-resolved studies by various diffraction and scattering techniques provided comprehensive information about crystallization kinetics, crystal growth mechanism and structural dynamics triggered by external physical or chemical stimuli. The review emphasizes most relevant advanced structural studies of MOFs based on powder X-ray and neutron scattering.

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“…Catalytic oxidation of CO over MOFs materials has also drawn much research attention. For MOFs-based catalysts, MOFs generally play the role of supports for noble metals like Au, Ag, and Pd [30][31][32], or as the hosts for the synthesis of active metal oxides such as Co 3 O 4 [33] and CuO [34,35].…”

Section: Introductionmentioning

confidence: 99%

Thermal Activation of CuBTC MOF for CO Oxidation: The Effect of Activation Atmosphere

Zhang

Zhan

et al. 2017

Catalysts

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High performance catalysts for carbon monoxide (CO) oxidation were obtained through thermal activation of a CuBTC (BTC: 1,3,5-benzenetricarboxylic acid) metal-organic framework (MOF) in various atmospheres. X-ray diffraction (XRD), X-ray photonelectron spectroscopy (XPS), N 2 adsorption-desorption measurement, and field emission scanning electron microscopy (FESEM) were adopted to characterize the catalysts. The results show that thermal activation by reductive H 2 may greatly destroy the structure of CuBTC. Inert Ar gas has a weak influence on the structure of CuBTC. Therefore, these two catalysts exhibit low CO oxidation activity. Activating with O 2 is effective for CuBTC catalysts, since active CuO species may be obtained due to the slight collapse of CuBTC structure. The highest activity is obtained when activating with CO reaction gas, since many pores and more effective Cu 2 O is formed during the thermal activation process. These results show that the structure and chemical state of coordinated metallic ions in MOFs are adjustable by controlling the activation conditions. This work provides an effective method for designing and fabricating high performance catalysts for CO oxidation based on MOFs.

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Au@ZIF-8: CO Oxidation over Gold Nanoparticles Deposited to Metal−Organic Framework

Cited by 793 publications

References 37 publications

Confined Pt and CoFe₂O₄Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Confined Pt and CoFe₂O₄Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Chemistry of Metal-organic Frameworks Monitored by Advanced X-ray Diffraction and Scattering Techniques

Thermal Activation of CuBTC MOF for CO Oxidation: The Effect of Activation Atmosphere

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Au@ZIF-8: CO Oxidation over Gold Nanoparticles Deposited to Metal−Organic Framework

Cited by 793 publications

References 37 publications

Confined Pt and CoFe2O4Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Confined Pt and CoFe2O4Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Chemistry of Metal-organic Frameworks Monitored by Advanced X-ray Diffraction and Scattering Techniques

Thermal Activation of CuBTC MOF for CO Oxidation: The Effect of Activation Atmosphere

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Confined Pt and CoFe₂O₄Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Confined Pt and CoFe₂O₄Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity