Strong Metal–Support Interaction: Growth of Individual Carbon Nanofibers from Amorphous Carbon Interacting with an Electron Beam

Zhang, Wei; Kuhn, Luise Theil

doi:10.1002/cctc.201300452

Cited by 14 publications

(13 citation statements)

References 57 publications

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“…It is noted that the metals doped CeO 2 systems enable self‐regenerate metals by applying the reduction–oxidation treatment or electron irradiation (Zhang & Theil Kuhn, ; Djinović et al ., ; Kurnatowska et al ., ). Rh can be migrated to the doped CeO 2 surface under reduction while it annihilates into the support with a further oxidation (Kurnatowska et al ., ).…”

Section: Pt/ceo2 Systemmentioning

confidence: 99%

Real‐space observation of strong metal‐support interaction: state‐of‐the‐art and what's the next

Shi

Zhang

et al. 2015

Journal of Microscopy

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The real-space resolving of the encapsulated overlayer in the well-known model and industry catalysts, ascribed to the advent of dedicated transmission electron microscopy, enables us to probe novel nano/micro architecture chemistry for better application, revisiting our understanding of this key issue in heterogeneous catalysis. In this review, we summarize the latest progress of real-space observation of SMSI in several well-known systems mainly covered from the metal catalysts (mostly Pt) supported by the TiO2 , CeO2 and Fe3 O4 . As a comparison with the model catalyst Pt/Fe3 O4 , the industrial catalyst Cu/ZnO is also listed, followed with the suggested ongoing directions in the field.

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Section: Pt/ceo2 Systemmentioning

confidence: 99%

Real‐space observation of strong metal‐support interaction: state‐of‐the‐art and what's the next

Shi

Zhang

et al. 2015

Journal of Microscopy

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“…Advanced transmission electron microscopy (TEM) techniques are powerful and versatile research tools for probing the structural information of complex nanomaterials in three distinct ways: in real space, in reciprocal space, and when used in a spectroscopic mode, in energy space . It provides local information of surface and bulk of samples at atomic scale and also reveals chemical, electronic, and three‐dimensional structural information . For electron microscopists, the past 80 years have been a wonderfully exciting time in nanomaterials science, ascribed to a continuous rapid development in all of its various modes and detectors, as shown in Figure .…”

Section: Milestones Of Transmission Electron Microscopymentioning

confidence: 99%

Transmission Electron Microscopy and the Science of Carbon Nanomaterials

Zhang

2013

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Carbon is a unique and versatile element that is capable of forming different architectures at nanoscale. The element has become a key component in nanoscience and nanotechnology. Transmission electron microscopy (TEM) acts as "our eyes" enabling us not only to reveal the morphology, but also to provide structural, chemical and electronic information of nanocarbon on the atomic level. In fact, except for fullerene, nearly all types of carbon nanomaterials were discovered by TEM, such as carbon nanotubes, carbon nanocones, and graphene-like nanocarbon. It cannot be imagined what nanoscience and nanotechnology would be without the contributions of TEM. Herein, the "interaction" between TEM and the science of carbon nanomaterials is reviewed and it is demonstrated for some selected examples that TEM provides a dramatic driving force for the development of nanocarbon science.

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“…It is known that the strain of CC (sp 2 ‐type) bonds may activate the reactivity owing to the curvature present in these nanostructures, enabling coordination and activation of reactants ranging from O 2 to Cl 2 3. 11 Therefore, these structures have, in principle, interesting catalytic properties, which may be tuned by nano‐ordering and suitable control of the parent amorphous carbon material, which in contrast, does frequently not show such catalytic properties 17…”

Section: Introductionmentioning

confidence: 99%

Onion‐Like Graphene Carbon Nanospheres as Stable Catalysts for Carbon Monoxide and Methane Chlorination

et al. 2015

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Thermal treatment induces a modification in the nanostructure of carbon nanospheres that generates ordered hemi‐fullerene‐type graphene shells arranged in a concentric onion‐type structure. The catalytic reactivity of these structures is studied in comparison with that of the parent carbon material. The change in the surface reactivity induced by the transformation of the nanostructure, characterized by TEM, XRD, X‐ray photoelectron spectroscopy (XPS), Raman, and porosity measurements, is investigated by multipulses of Cl2 in inert gas or in the presence of CH4 or CO. The strained CC bonds (sp2‐type) in the hemi‐fullerene‐type graphene shells induce unusually strong, but reversible, chemisorption of Cl2 in molecular form. The active species in CH4 and CO chlorination is probably in the radical‐like form. Highly strained CC bonds in the parent carbon materials react irreversibly with Cl2, inhibiting further reaction with CO. In addition, the higher presence of sp3‐type defect sites promotes the formation of HCl with deactivation of the reactive CC sites. The nano‐ordering of the hemi‐fullerene‐type graphene thus reduces the presence of defects and transforms strained CC bonds, resulting in irreversible chemisorption of Cl2 to catalytic sites able to perform selective chlorination.

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Strong Metal–Support Interaction: Growth of Individual Carbon Nanofibers from Amorphous Carbon Interacting with an Electron Beam

Cited by 14 publications

References 57 publications

Real‐space observation of strong metal‐support interaction: state‐of‐the‐art and what's the next

Real‐space observation of strong metal‐support interaction: state‐of‐the‐art and what's the next

Transmission Electron Microscopy and the Science of Carbon Nanomaterials

Onion‐Like Graphene Carbon Nanospheres as Stable Catalysts for Carbon Monoxide and Methane Chlorination

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