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Чесноков, В. В.; Prosvirin, Igor P.; Zaitseva, N. A.; Зайковский, В. И.; Molchanov, V. V.

doi:10.1023/a:1021646906355

Cited by 41 publications

(14 citation statements)

References 10 publications

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“…The higher reduction temperature on Pd/CNF90-ox can probably be ascribed to the more stable acidic groups and less basal plane on the CNF90-ox as shown in figure 2(b), thus stabilizing the palladium precursor. It is in agreement with the observation from Chesnokov et al [19], which revealed that more fractions of Pd 2+ /Pd are found after reduction of CNF90 due to the higher interaction between the metal and support. The similar temperature of H 2 consumption on Pd/CNF00-ox, Pd/CNF20-ox, indicates that the palladium activities are almost the same for those samples, due to the similar microstructure on the specific domain where palladium precursor interacts with.…”

Section: Characterization Of Carbon Nanofiber Supported Palladium Catsupporting

confidence: 93%

“…Moreover, some previous reports show that the graphite platelet orientation of CNFs can significantly influence the catalytic behavior [18][19][20]. To our best knowledge, no systematic study exists on the effect of the graphitic platelet orientation on the surface chemistry of the oxidized CNFs, and thus on the preparation of metal catalysts supported on the CNFs.…”

Section: Introductionmentioning

confidence: 99%

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The effect of graphitic platelet orientation on the properties of carbon nanofiber supported Pd catalysts prepared by ion exchange

et al. 2007

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Carbon nanofibers with different nanostructures are prepared by catalytic CVD at 873 K using different catalysts and carboncontaining gases. As-grown carbon nanofibers are treated in concentrated nitric acid to introduce oxygen-containing groups, and therefore, to anchor palladium. The TPD-MS method is used to determine the number of acidic oxygen-containing groups and the results show that the number of oxygen-containing groups was strongly dependent on the graphitic platelet orientation. TEM, CO pulse chemisorption, and ICP-AES are used to characterize carbon nanofiber supported palladium catalysts. The results show that palladium particle sizes and palladium loading are dependent on the amounts of oxygen-containing groups on carbon nanofibers. TPR results show that the interaction between the palladium and the oxidized carbon nanofibers can be tailored by the variation of graphitic platelet orientation. A linear correlation between the amount of acidic groups and the palladium loading are observed.

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Section: Characterization Of Carbon Nanofiber Supported Palladium Catsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

The effect of graphitic platelet orientation on the properties of carbon nanofiber supported Pd catalysts prepared by ion exchange

et al. 2007

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“…The state of highly dispersed Pd particles supported on filamentous carbon was studied using HRTEM, XPS, and X-ray diffraction analysis. 25 Three types of filamentous carbon were used, in which the basal planes of graphite were arranged along, across, and at an angle to the nanofiber axis. The structure of the carbon support was found to affect the properties of the active component for the reaction of selective 1,3-butadiene hydrogenation to butenes.…”

Section: Alkene and Alkyne Hydrogenationmentioning

confidence: 99%

Heterogeneous Catalysis on Nanostructured Carbon Material Supported Catalysts

2015

Nanostructured Carbon Materials for Catalysis

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For almost twenty years there has been an increasing interest in the use of nanostructured carbon materials as catalyst supports. 1-16 Following the nanotechnology wave, a wide variety of carbon nanomaterials has been investigated as catalyst supports, including fullerenes, CNTs, CNFs, carbon onions, nanodiamonds, FLG or GO. CNTs and CNFs, which constitute a new family of support offering a good compromise between the advantages of AC and high surface area graphite have been particularly studied. The main advantages offered by CNT or CNF supports are: 17 (i) the high purity of the material can avoid self-poisoning; (ii) the mesoporous nature of these supports can be of interest for liquid-phase reactions, thus limiting the mass transfer; (iii) the high thermal conductivity that limits hot-spots that can damage the catalyst; (iv) their well-defined and tunable structure; (v) their rich surface chemistry that offers numerous perspectives for adsorption and dispersion of the active phase; and (vi) the specific metal support interactions, due to high electrical conductivity of the support and to the tunable orientation of the graphene layers, that exist and that can directly affect catalytic activity and selectivity. The possibility to perform catalysis in a confined space is also of great interest. 6,18 From a theoretical viewpoint, graphene provides the ultimate two-dimensional model of a catalytic support. The reason is related to its high theoretical surface area (ca. 2630 m 2 g −1 ), high conductivity, unique graphitized basal plane structure and chemical tolerance. FLG,

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“…Few studies have reported the presence of charge transfer for CNF systems. Chesnokov et al reported a shift in the binding energy of the Pd3d peak found from XPS, attributed to electron transfer from Pd to carbon [28]. Elsewhere, transfer of p-electrons from the graphitic planes to metal particles was introduced to explain the increased selectivity towards the unsaturated alcohol in hydrogenation of cinnamaldehyde [29,30].…”

Section: Kinetics Of Hydrogen Oxidation On Pt/cnfsmentioning

confidence: 99%

Hydrogen Oxidation Catalyzed by Pt Supported on Carbon Nanofibers with Different Graphite Sheet Orientations

et al. 2009

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The kinetic study of hydrogen oxidation with or without the presence of CO has been used as a tool to study the relative oxygen and CO adsorption strength on Pt nanoparticles, which are important parameters for fuel cell catalysts. It was found that the activation energy, which is determined by the oxygen binding energy, is influenced by the CNF graphite sheet orientation, CNF oxygen groups and catalyst preparation method. A weaker bonding of oxygen was indicated for Pt nanoparticles supported on platelet compared to Pt on fishbone CNFs. Moreover, oxygen seemed to be more strongly bonded to Pt particles on CNFs prepared by deposition-precipitation compared to those prepared by incipient wetness impregnation and a metal-oxide colloid method. Enhanced CO-adsorption was indicated for Pt supported on carbon nanofibers with introduced oxygen groups.

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Cited by 41 publications

References 10 publications

The effect of graphitic platelet orientation on the properties of carbon nanofiber supported Pd catalysts prepared by ion exchange

The effect of graphitic platelet orientation on the properties of carbon nanofiber supported Pd catalysts prepared by ion exchange

Heterogeneous Catalysis on Nanostructured Carbon Material Supported Catalysts

Hydrogen Oxidation Catalyzed by Pt Supported on Carbon Nanofibers with Different Graphite Sheet Orientations

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