Hydrophobic core–hydrophilic shell-structured catalysts: a general strategy for improving the reaction rate in water

Yang, Hengquan; Jiao, Xuan; Li, Shuru

doi:10.1039/c2cc36273b

Cited by 35 publications

(23 citation statements)

References 31 publications

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“…Yang et al. demonstrated that the micelle‐like Pd/SiO 2 catalyst with a hydrophobic core and a hydrophilic shell functions as a micelle in the hydrogenation reaction, which drives the solubilisation of organic reactants in the water phase to alleviate the kinetic barriers caused by the transport of organic substrates to catalytic sites 11a. Herein, to demonstrate the miceller acceleration of the catalyst at the water–oil interface in Pickering emulsions, the CA of benzyl alcohol was measured on the catalyst surface.…”

Section: Resultsmentioning

confidence: 99%

Magnetic Superhydrophobic Polymer Nanosphere Cage as a Framework for Miceller Catalysis in Biphasic Media

et al. 2014

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This study demonstrated the use of a magnetic superhydrophobic polymer nanosphere cage derived from a Pickering emulsion as a framework for miceller catalysis in biphasic media. We designed this system through the covalent stabilisation of active site (2,2,6,6‐tetramethylpiperidine 1‐oxyl)‐grafted amphiphiles onto the magnetic hydrophobic core to form a micelle‐like architecture and used it as a Pickering emulsifier to develop a new kind of micelle‐catalysed biphasic system. The catalysis results reveal that these fixed micelle‐tethered 2,2,6,6‐tetramethylpiperidine 1‐oxyl catalysts demonstrate much higher activity than their soluble counterparts in the biphasic Montanari oxidation of alcohols, which could be due to the unique properties of Pickering emulsion and miceller catalysis. In addition, the excellent magnetic response ensures the efficient recycling of the catalyst by magnetic decantation. The catalyst can be recycled at least 10 times without significant loss of activity or degradation of magnetic susceptibility. Moreover, this study demonstrates that this new Pickering emulsion‐based and micelle‐catalysed biphasic system is technically simple and practically applicable.

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Section: Resultsmentioning

confidence: 99%

Magnetic Superhydrophobic Polymer Nanosphere Cage as a Framework for Miceller Catalysis in Biphasic Media

et al. 2014

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“…The table contains information on the metal surface and RO activity for furans, as revealed by DFT analysis reported in refs. .…”

Section: Deoxygenation Of High‐carbon Oxygenatesmentioning

confidence: 97%

“…This strategy can be further enhanced by the design and application of hydrophobic catalysts with unique structural features. Catalysts with hydrophobic cores and hydrophilic shells, with Pd or other noble‐metal NPs loaded on the exterior surface, with radically arrayed pores, are suitable candidates to enhance the rate of hydrogenolysis of long‐carbon‐chain furan derivatives from fully hydrogenated oxygenates . This strategy of using a catalyst with a highly hydrophilic exterior support may offer a very high selectivity for the formation of the hydrogenolysis product resulting from selective RO.…”

Section: Deoxygenation Of High‐carbon Oxygenatesmentioning

confidence: 98%

Hydro(deoxygenation) Reaction Network of Lignocellulosic Oxygenates

Dutta

2020

ChemSusChem

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He has more than 10 years of professional academic research experience in nano-and biocatalysis, porous and framework materials, and electrochemistry.T he last eight years of his research has centered on the chemistry of lignocellulose, lignocellulose-derived materials, enzymatic processes, and understanding of their chemical reaction networks. He is currently interested in biocomposite materials research for therapeutic and related applications. This also includes materials for electrochemical energy generation and biomass-derived novel materials for advanced applications. Figure 2. Biomass (cellulose) to alkane conversion through HDO and hydrogenolysis-based reaction scanned by using the vibrational properties of absorbed molecules on the catalyst surface, as elucidated by combined INS/DFT analysis.

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“…[90][91][92][93] The hydrophobization of mesoporous materials via replacing surface hydrophilic Si-OH, with hydrophobic functionalities is of mesoporous materials can significantly improve hydrothermal stability, [94][95][96] adsorption efficiency toward organic molecules, [97][98][99][100][101][102][103] and catalytic reaction rate. [104][105][106][107][108][109][110][111] In this paper, we investigated adsorption graphene on MCM41 at distance 1.8 Å, 2 Å and 2.3 Å. Here, the adsorption energy is defined as …”

Section: Introductionmentioning

confidence: 99%

Adsorption of Microporous Silica Material (mcm-41) on Graphene Sheet as a Nano-Carrier

Shadmani

Monajjemi

Zare

2016

j comput theor nanosci

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In this work, we have investigated the MCM-41 (M41) adsorbed on the graphene sheet noncovalently and covalently using B3LYP/6-31G * and M05-2X/6-31G * * levels at different distances. The nuclear magnetic resonance (NMR) of 1 H and 13 C, 17 O and 29 Si has calculated by gauge independent atomic orbital (GIAO) method for M41G at 1.8, 2 and 2.3 Å. A study on the electronic properties, such as HOMO and LUMO energies, natural bond-orbital (NBO) analysis and properties structure, ChelpG have been performed by DFT methods. Density functional theory (DFT) calculations has done using GAMESS-US package of program.

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Hydrophobic core–hydrophilic shell-structured catalysts: a general strategy for improving the reaction rate in water

Abstract: A novel solid catalyst featuring a hydrophobic core-hydrophilic shell structure was synthesized for aqueous-phase reactions, which showed significant reaction rate enhancement effects.

Cited by 35 publications

References 31 publications

Magnetic Superhydrophobic Polymer Nanosphere Cage as a Framework for Miceller Catalysis in Biphasic Media

Magnetic Superhydrophobic Polymer Nanosphere Cage as a Framework for Miceller Catalysis in Biphasic Media

Hydro(deoxygenation) Reaction Network of Lignocellulosic Oxygenates

Adsorption of Microporous Silica Material (mcm-41) on Graphene Sheet as a Nano-Carrier

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