Preparation and Activity of Small Rhodium Metal Particles on Fishbone Carbon Nanofibres

Ros, T.G.; Keller, Daphne E.; Dillen, A.J. van; Geus, J.W.; Koningsberger, D.C.

doi:10.1006/jcat.2002.3695

Cited by 10 publications

(6 citation statements)

References 37 publications

(29 reference statements)

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“…In other words, in order to produce carbon nanomaterials in large quantity, one must prepare catalysts in the form of nanoparticles. For the generation of catalysts or catalyst precursors, techniques such as sol-gel approaches [ 60 , 61 , 62 ], incipient wetness impregnation [ 112 , 113 , 114 ], co-reduction of precursors [ 115 , 116 ], ion-exchange-precipitation [ 117 , 118 , 119 , 120 ], lithography [ 121 ] and ion-adsorption-precipitation [ 122 ] are often used. Since the size of catalyst nanoparticles is dependent on the preparation method, the method for catalyst preparation has an effect on the performance of the as-prepared catalyst [ 109 , 123 ].…”

Section: Resultsmentioning

confidence: 99%

Large-Scale Synthesis of Carbon Nanomaterials by Catalytic Chemical Vapor Deposition: A Review of the Effects of Synthesis Parameters and Magnetic Properties

Qin

Wang

et al. 2010

Materials

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Section: Resultsmentioning

confidence: 99%

Large-Scale Synthesis of Carbon Nanomaterials by Catalytic Chemical Vapor Deposition: A Review of the Effects of Synthesis Parameters and Magnetic Properties

Qin

Wang

et al. 2010

Materials

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“…ways of metal deposition on these materials are put forward in literature, e.g. [13,16,20,21,66,68,69] resulting in catalyst which can be among the most active one for e.g., cinnamaldehyde hydrogenation [16].…”

Section: Discussionmentioning

confidence: 99%

“…The thus formed carbon atoms migrate through/over the metal to assemble into CNF [1,2,44,45]. CNF growth critically depends on a number of factors such as temperature, nature of the catalyst and source of carbon [1,2,20,39,[46][47][48][49][50][51][52][53][54][55].…”

Section: Introductionmentioning

confidence: 99%

Catalytic growth of macroscopic carbon nanofiber bodies with high bulk density and high mechanical strength

Lee

Dillen

Geus

et al. 2006

Carbon

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Carbon nanofibers (CNF) are non-microporous graphitic materials with a high surface area (100-200 m 2 /g), high purity and tunable surface chemistry. Therefore the material has a high potential for use as catalyst support. However, in some instances it is claimed that the low density and low mechanical strength of the macroscopic particles hamper their application. In this study we show that the bulk density and mechanical strength of CNF bodies can be tuned to values comparable to that of commercial fluid-bed and fixed-bed catalysts. The fibers were prepared by the chemical decomposition of CO/H 2 over Ni/SiO 2 catalysts. The resulting fibers bodies (1.2 m mm) were replicates of the Ni/SiO 2 bodies (0.5 mm) from which they were grown. The bulk density of CNF bodies crucially depended on the metal loading in the growth catalyst. Over 5 wt% Ni/SiO 2 low density bodies (0.4 g/ml) are obtained while 20 wt% Ni/SiO 2 leads to bulk densities up to 0.9 g/ml with a bulk crushing strength of 1.2 MPa. The 20 wt% catalysts grow fibers with diameters of 22 nm, which grow irregularly in space, resulting in a higher entanglement and a concomitant higher density and strength as compared to the thinner fibers (12 nm) grown from 5 wt% Ni/SiO 2 .

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“…Su et al has successfully synthesis CNFs on AC support with Fe catalyst using C 2 H 4 as the carbon source [23,24]. Such composites have found applications both as adsorbents and in catalysis [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Controlling the yield and structure of carbon nanofibers grown on a nickel/activated carbon catalyst

Rinaldi

Abdullah

Ali

et al. 2009

Carbon

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Carbon nanofibers (CNFs) were grown via the chemical vapor deposition of C2H4 on an activated carbon (AC)-supported Ni catalyst. The texture of the CNF/AC composites can be tuned by varying the growth temperature and by treatment in reducing atmosphere prior to C2H4/H2 exposure. The Ni-catalyzed gasification of the AC support increases the microporosity of the composite and shown to be dominant throughout the composite synthesis especially during reduction, subsequent treatment in reducing atmosphere, and CNF growth at low temperatures. N2 isotherm and scanning electron microscope were used to characterize the texture and morphology of the composites. Subsequent treatment in reducing atmosphere were shown to increase the Ni catalyst activity to grow CNFs. High resolution transmission electron microscope however did not reveal any microstructural difference for Ni catalyst with and without the subsequent reduction treatment. We propose in this paper that the carbon dissolutions during treatment of the catalyst might have an implication on the CNF growth.

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Preparation and Activity of Small Rhodium Metal Particles on Fishbone Carbon Nanofibres

Cited by 10 publications

References 37 publications

Large-Scale Synthesis of Carbon Nanomaterials by Catalytic Chemical Vapor Deposition: A Review of the Effects of Synthesis Parameters and Magnetic Properties

Large-Scale Synthesis of Carbon Nanomaterials by Catalytic Chemical Vapor Deposition: A Review of the Effects of Synthesis Parameters and Magnetic Properties

Catalytic growth of macroscopic carbon nanofiber bodies with high bulk density and high mechanical strength

Controlling the yield and structure of carbon nanofibers grown on a nickel/activated carbon catalyst

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