Nitrogen-doped magnetic carbon nanoparticles as catalyst supports for efficient recovery and recycling

Yoon, Hyeonseok; Ko, Sungrok; Jang, Jyongsik

doi:10.1039/b616660a

Cited by 209 publications

(91 citation statements)

References 30 publications

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“…High metal dispersion was detected for different metal species (Au [92], Pd [93], Pt [94,95], Co [87], MoS2 [96]) on several doped carbon surfaces (N and O-doped carbon nanotubes, N-doped mesoporous carbon, N-doped carbon shells, carbon nanosphere, polyaniline (PANI) fibers). The presence of nitrogen has been demonstrated to assure excellent metal dispersion, even at very high metal loading [93].…”

Section: Transmission Electron Microscopies and Other Imaging Techniquesmentioning

confidence: 99%

Understanding Heteroatom-Mediated Metal–Support Interactions in Functionalized Carbons: A Perspective Review

2018

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Featured Application: Surface engineering for catalysis and energy.Abstract: Carbon-based materials show unique chemicophysical properties, and they have been successfully used in many catalytic processes, including the production of chemicals and energy. The introduction of heteroatoms (N, B, P, S) alters the electronic properties, often increasing the reactivity of the surface of nanocarbons. The functional groups on the carbons have been reported to be effective for anchoring metal nanoparticles. Although the interaction between functional groups and metal has been studied by various characterization techniques, theoretical models, and catalytic results, the role and nature of heteroatoms is still an object of discussion. The aim of this review is to elucidate the metal-heteroatoms interaction, providing an overview of the main experimental and theoretical outcomes about heteroatom-mediated metal-support interactions. Selected studies showing the effect of heteroatom-metal interaction in the liquid-phase alcohol oxidation will be also presented.

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Section: Transmission Electron Microscopies and Other Imaging Techniquesmentioning

confidence: 99%

Understanding Heteroatom-Mediated Metal–Support Interactions in Functionalized Carbons: A Perspective Review

2018

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“…The presence of 3NV defects in CNT, suggests that the reactivity might be greatly enhanced compared with the pure CNT, thus becoming a recently hot topic. 16,[20][21][22][23][24][25][26][27][28] By introducing new levels close to the Fermi level, doping with nitrogen can change the sensibility of CNT to different kinds of molecules, for example the CN x NTs can be used as gas sensors of toxic species. 16,20 Moreover, the capability of Li storage in the CN x NT is significantly increased for battery applications.…”

Section: 10mentioning

confidence: 99%

Carbon Nanotubes Doped with Nitrogen, Pyridine-like Nitrogen Defects, and Transition Metal Atoms

Mananghaya¹

2012

Journal of the Korean Chemical Society

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ABSTRACT. Dopants and defects can be introduced as well as the intercalation of metals into single wall carbon nanotubes (SWCNTs) to modify their electronic and magnetic properties, thus significantly widening their application areas. Through spinpolarized density functional theory (DFT) calculations, we have systemically studied the following: (i) (10,0) and (5,5) SWCNT doped with nitrogen (CNxNT), (ii) (10,0) and (5,5) SWCNT with pyridine-like defects (3NV-CNxNT), and (iii) chemical functionalization of (10,0) and (5,5) 3NV-CNxNT with 12 different transition metals (TMs) (Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Pd, and Pt). Attention was done in searching for the most stable configurations, deformation, calculating the formation energies, and exploring the effects of the doping concentration of nitrogen and pyridine-like nitrogenated defects on the electronic properties of the nanotubes. Also, calculating the corresponding binding energies and effects of chemical functionalization of TMs on the electronic and magnetic properties of the nanotubes has been made. We found out that the electronic properties of SWCNT can be effectively modified in various ways, which are strongly dependent not only on the concentration of the adsorbed nitrogen but also to the configuration of the adsorbed nitrogen impurities, the pyridine-like nitrogenated defects, and the TMs absorbed; due to the strong interaction between the d orbitals of TMs and the p orbitals of N atoms, the binding strengths of TMs with the two 3NV-CNxNT are significantly enhanced when compared to the pure SWCNTs.

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“…Metal/N-CNTs system resulted more active than metal/pristine when tested in different reactions. For example, highly dispersed metal nanoparticles immobilized on nitrogen doped CNTs showed better activity than pristine CNTs for methanol oxidation [16] and hydrogenation of cinnamaldehyde [17,18] and Heck reaction of iodobenzene and styrene [19]. We recently reported the preparation of N-CNTs sample by a gas phase procedure [20].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen functionalized carbon nanostructures supported Pd and Au–Pd NPs as catalyst for alcohols oxidation

et al. 2010

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Two different carbon nanotubes (CNTs) PR24-PS and Baytubes were functionalized by oxidation with nitric acid and further amination with gaseous NH3. Thus Au and Au-Pd nanoparticles were prepared by PVA/NaBH4 system and anchored on the surface of pristine CNTs and NCNTs (Nitrogen functionalized carbon nanotubes). TEM analysis revealed that the introduction of nitrogen functionalities improves the dispersion of the metal nanoparticles on the surface of the support. This phenomena leads to an improved activity of N-CNTs based catalysts with the respect of pristine CNTs when tested in the liquid phase oxidation of alcohols.

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Nitrogen-doped magnetic carbon nanoparticles as catalyst supports for efficient recovery and recycling

Abstract: Palladium nanoparticles were deposited with high dispersion and stability on nitrogen-doped magnetic carbon nanoparticles by a simple impregnation method, and their catalytic performance was investigated for Heck, Suzuki, and Sonogashira coupling reactions.

Cited by 209 publications

References 30 publications

Understanding Heteroatom-Mediated Metal–Support Interactions in Functionalized Carbons: A Perspective Review

Understanding Heteroatom-Mediated Metal–Support Interactions in Functionalized Carbons: A Perspective Review

Carbon Nanotubes Doped with Nitrogen, Pyridine-like Nitrogen Defects, and Transition Metal Atoms

Nitrogen functionalized carbon nanostructures supported Pd and Au–Pd NPs as catalyst for alcohols oxidation

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