Support effects in the hydrogenation of cinnamaldehyde over carbon nanofiber-supported platinum catalysts: characterization and catalysis

Toebes, Marjolein L.; Zhang, Yihua; Hájek, Jan; Nijhuis, T.A.; Bitter, Johannes H.; Dillen, A.J. van; Murzin, Dmitry Yu.; Koningsberger, D.C.; Jong, Krijn P. de

doi:10.1016/j.jcat.2004.05.026

Cited by 197 publications

(71 citation statements)

References 26 publications

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“…Moreover, recent discoveries led the family of carbon materials to further expand so as to include the low-dimensional allotropes (fullerenes, carbon nanotubes, carbon nanofibers, graphene) [8][9][10]. The use of nanostructured carbonaceous materials in catalysis resulted in the introduction of some additional advantageous features, such as confinement [11][12][13], electronic effects [14][15][16], and unique C 2018, 4, 9 2 of 17 surface reactivity [17][18][19], whose extent is strongly determined by the structural parameters (e.g., diameter, length, chirality, topological defects) [20]. The latter are not easily tunable during the synthesis; therefore, it is difficult to obtain carbon nanostructured materials with tailored properties.…”

Section: Introductionmentioning

confidence: 99%

Controlling the Incorporation of Phosphorus Functionalities on Carbon Nanofibers: Effects on the Catalytic Performance of Fructose Dehydration

Campisi

Trujillo

Motta

et al. 2018

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Phosphorylated carbons have been reported to be effective catalysts in dehydration reactions for biomass valorization. The amount and the nature of P groups are a key parameter affecting the catalytic performances of functionalized materials. Herein, we investigate the role of structural and surface properties of carbon-based materials, specifically carbon nanofibers, in determining the amount of P-functionalities. In order to incorporate P groups on carbon surfaces, various carbon nanofibers (CNFs) with different graphitization degrees have been functionalized through treatment with a H 3 PO 4 -HNO 3 mixture at 150 • C. The pristine materials, as well as the functionalization protocol, were properly selected to achieve an effective functionalization without drastically altering the morphology of the samples. Surface and structural properties of the synthesized functionalized materials have been investigated by means of transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The catalytic behavior of phosphorylated carbon nanofibers has been evaluated in the selective dehydration of fructose to hydroxymethylfurfural (HMF) to elucidate structure-activity relationships.

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Section: Introductionmentioning

confidence: 99%

Controlling the Incorporation of Phosphorus Functionalities on Carbon Nanofibers: Effects on the Catalytic Performance of Fructose Dehydration

Campisi

Trujillo

Motta

et al. 2018

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“…Along with the hydrogenation products such as HCAL, HCOL (Scheme 1), substantial amounts of acetals (diisopropyl acetal of hydrocinnamaldehyde, HCAL-IPA and diisopropyl acetal of cinnamaldehyde, CAL-IPA) were obtained. The acetals are formed by a reversible acid-catalyzed reaction of CAL and HCAL with isopropanol [9,10,16,21]. It should be mentioned that the CAL-IPA concentration was …”

Section: Hydrogenation Of Cal Over the Pt/sio2 Catalysts In Batch Andmentioning

confidence: 99%

“…Other reactions such as aromatic ring hydrogenation or hydrogenolysis are possible, but these generally require considerably harsher conditions and are usually negligible [9,10]. The C=C hydrogenation is thermodynamically Various factors such as the type of metal [12][13][14][15], particle size [16], additives [17][18][19][20] and supports [1,4,16,[21][22][23] were found to influence the activity and selectivity of the catalysts in CAL hydrogenation dramatically. In general, noble metals are used for the CAL hydrogenation because of their high activity at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

Highly Selective Continuous Flow Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol in a Pt/SiO2 Coated Tube Reactor

et al. 2018

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A novel continuous flow process for selective hydrogenation of α, β-unsaturated aldehyde (cinnamaldehyde, CAL) to the unsaturated alcohol (cinnamyl alcohol, COL) has been reported in a tube reactor coated with a Pt/SiO 2 catalyst. A 90% selectivity towards the unsaturated alcohol was obtained at the aldehyde conversion of 98.8%. This is a six-fold improvement in the selectivity compared to a batch process where acetals were the main reaction products. The increased selectivity in the tube reactor was caused by the suppression of acid sites responsible for the acetal formation after a short period on stream in the continuous process. In a fixed bed reactor, it had a similar acetal suppression phenomenon but showed lower product selectivity of about 47-72% due to mass transfer limitations. A minor change in selectivity and conversion caused by product inhibition was observed during the 110 h on stream with a turnover number (TON) reaching 3000 and an alcohol production throughput of 0.36 kg g Pt −1 day −1 in the single tube reactor. The catalysts performance after eight reaction cycles was fully restored by calcination in air at 400 • C. The tube reactors provide an opportunity for process intensification by increasing the reaction rates by a factor of 2.5 at the reaction temperature of 150 • C compared to 90 • C with no detrimental effects on catalyst stability or product selectivity.

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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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Support effects in the hydrogenation of cinnamaldehyde over carbon nanofiber-supported platinum catalysts: characterization and catalysis

Cited by 197 publications

References 26 publications

Controlling the Incorporation of Phosphorus Functionalities on Carbon Nanofibers: Effects on the Catalytic Performance of Fructose Dehydration

Controlling the Incorporation of Phosphorus Functionalities on Carbon Nanofibers: Effects on the Catalytic Performance of Fructose Dehydration

Highly Selective Continuous Flow Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol in a Pt/SiO2 Coated Tube Reactor

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

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