Catalytic nickel nanoparticles embedded in a mesoporous metal–organic framework

Park, Young Kwan; Choi, Sang Beom; Nam, Hye Jin; Jung, Duk Young; Ahn, Hee Choon; Choi, Kihang; Furukawa, Hiroyasu; Kim, Jaheon

doi:10.1039/c000775g

Cited by 145 publications

(56 citation statements)

References 27 publications

(2 reference statements)

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“…[1] Although currently a major thrust in MOF chemistry is the extension of pore sizes from the micropore to the mesopore regime, only a limited number of MOFs with pore sizes larger than 2 nm have been reported to date. [2][3][4][5] Along similar lines, the design of hierarchical MOFs with bimodal pore-size distributions featuring microand mesopores would be highly desirable for applications in which facile diffusion of molecules, coupled with molecular specificity, is a key requirement, such as in catalysis. [6,7] As opposed to MOFs, siliceous materials constitute an abundant class of compounds that cover different pore-size regimes by featuring topologies on the micro-, meso-, and macroscale, in which microporous zeolites and mesoporous silica are amongst the most famous representatives of these ordered porous materials.…”

Section: Introductionmentioning

confidence: 98%

Towards Mesostructured Zinc Imidazolate Frameworks

Junggeburth¹,

Schwinghammer²,

Virdi³

et al. 2012

Chemistry A European J

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The transfer of supramolecular templating to the realm of metal-organic frameworks opens up new avenues to the design of novel hierarchically structured materials. We demonstrate the first synthesis of mesostructured zinc imidazolates in the presence of the cationic surfactant cetyltrimethylammonium bromide (CTAB), which acts as a template giving rise to ordered lamellar hybrid materials. A high degree of order spanning the atomic and mesoscale was ascertained by powder X-ray diffraction, electron diffraction, as well as solid-state NMR and IR spectroscopy. The metrics of the unit cells obtained for the zinc methylimidazolate and imidazolate species are a=(11.43±0.45), b=(9.55±0.35), c=(27.19±0.34) Å, and a=(10.98±0.90), b=(8.95±0.95), c=(26.33±0.34) Å, respectively, assuming orthorhombic symmetry. The derived structure model is consistent with a mesolamellar structure composed of bromine-terminated zinc (methyl)imidazolate chains interleaved with motionally rigid cationic surfactant molecules in an all-trans conformation. The hybrid materials exhibit unusually high thermal stability up to 300 °C, at which point CTAB is lost and evidence for a thermally induced transformation into poorly crystalline mesostructures with larger feature sizes is obtained. Treatment with ethanol effects the extraction of CTAB from the material, followed by facile transformation into pure microporous ZIF-8 nanoparticles within minutes, thus demonstrating a unique transition from a mesostructure into a microporous zinc imidazolate.

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Section: Introductionmentioning

confidence: 98%

Towards Mesostructured Zinc Imidazolate Frameworks

Junggeburth¹,

Schwinghammer²,

Virdi³

et al. 2012

Chemistry A European J

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“…Various applications of MOFs, such as gas storage [30][31][32] and separation [33,34], have been studied. Applications of MOFs in catalysis have also been explored [35][36][37][38][39][40][41][42][43][44][45][46][47]. However, the exploration of their applications in different reactions is yet interesting.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of cyclic carbonates and dimethyl carbonate using CO2 as a building block catalyzed by MOF-5/KI and MOF-5/KI/K2CO3

et al. 2011

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The synthesis of cyclic carbonates or dimethyl carbonate (DMC) using CO 2 as a building block is a very interesting topic. In this work, we found that the metalorganic framework-5 (MOF-5)/KI was an active and a selective catalytic system for the synthesis of cyclic carbonates from CO 2 and epoxides, and MOF-5/KI/ K 2 CO 3 was efficient for the preparation of DMC from CO 2 , propylene, and methanol by a sequential route. The impacts of temperature, pressure, and reaction time length on the reactions were investigated, and the mechanism of the reactions is proposed on the basis of the experimental results.

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“…Particularly, the high specific surface area of MOFs may provide more attachment points for a cocatalyst, in which it could create more active sites and make better contact with reactants. On the other hand, the porous structures of MOFs can also provide extra pathways for the migration of photo-induced electrons and facilitate separation of the charge carrier [36,37]. For all these reasons, MOFs as a highly efficient photocatalyst could be expected.…”

Section: Introductionmentioning

confidence: 99%

Exploration of Zr–Metal–Organic Framework as Efficient Photocatalyst for Hydrogen Production

Jin

Yang

2017

Nanoscale Res Lett

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The application of metal-organic framework (MOF) in the field of photocatalysis is limited, because of its unstable chemical properties and failure to respond in visible light. Herein, the Pd/MOF catalysts were prepared by impregnation reduction. It is important that we have reasonably constructed the dye-sensitized system of Pd/MOF and successfully extended the application of MOF to the visible range. It exhibited maximal photocatalytic activity (9.43 mmol/g) under visible-light irradiation (λ ≥ 420 nm) with eosin Y as a photo-sensitizer, which was enhanced twice the order of magnitude compared with the pure MOF (0.03 mmol/g). The activation process with an exchangeable guest solvent produced the Zr-MOF with the high surface area and the high stability, which provide a great electronic transmission capacity. The Pd nanoparticles provide an electronic outlet, and the dye broadens the spectral absorption range. The synergistic effect of the various components contributes to the high hydrogen production activity. This work provides a reference for the application of MOF in the field of photocatalysis.

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Catalytic nickel nanoparticles embedded in a mesoporous metal–organic framework

Abstract: Ni nanoparticles embedded in the pores of a mesoporous MOF (MesMOF-1) act as a catalyst for hydrogenolysis of nitrobenzene or hydrogenation of styrene.

Cited by 145 publications

References 27 publications

Towards Mesostructured Zinc Imidazolate Frameworks

Towards Mesostructured Zinc Imidazolate Frameworks

Synthesis of cyclic carbonates and dimethyl carbonate using CO2 as a building block catalyzed by MOF-5/KI and MOF-5/KI/K2CO3

Exploration of Zr–Metal–Organic Framework as Efficient Photocatalyst for Hydrogen Production

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