Microreactor containing platinum nanoparticles for nitrobenzene hydrogenation

Kataoka, Sho; Takeuchi, Yasutaka; Harada, Atsuhiro; Takagi, Toshiyuki; Takenaka, Yasuyuki; Fukaya, Norihisa; Yasuda, Hiroyuki; Ohmori, Takao; Endo, Akira

doi:10.1016/j.apcata.2012.03.041

Cited by 62 publications

(29 citation statements)

References 30 publications

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“…Kataoka et al [57] applied immobilized platinum nanoparticles inside a microreactor in order to catalyze the hydrogena tion of nitrobenzene. To improve the adsorption and catalytic activity of the nanoparticles, catalytic support layers are offered as a film on the inner wall of the micro reactor.…”

Section: Applicationsmentioning

confidence: 99%

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Metallic nanoparticles made in flow and their catalytic applications in organic synthesis

Shahbazali

Hessel

Noël

et al. 2014

Nanotechnology Reviews

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This paper reviews recent developments on the synthesis of noble metal nanoparticles in micro and milli fluidic devices and their catalytic application in organic flow synthesis. A variety of synthesis methods using microfluidics is presented for gold, silver, palladium, platinum, and copper nanoparticles, including the for mation in singlephase flows and multiphase flows. In the field of organic chemistry, metal nanoparticles can be used as catalysts. This can lead to remarkably improved reaction performance in terms of minimizing the reaction time and higher yields. In this context, various applica tions of those metal nanoparticles as catalysts in micro fluidic devices are highlighted at selected examples. As a new direction and operational window, nanocatalysts may be synthesized in situ in flow and directly utilized in an organic synthesis. This allows making use of highly active, yet instable catalyst species, which may only have a very short life of a few seconds -a type of flashed nano catalyst organic synthesis.

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Section: Applicationsmentioning

confidence: 99%

“…Comparison of catalyst activity in microreactor and batch experiments (reproduced, with permission, from Elsevier BV)[57].…”

mentioning

confidence: 99%

Metallic nanoparticles made in flow and their catalytic applications in organic synthesis

Shahbazali

Hessel

Noël

et al. 2014

Nanotechnology Reviews

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“…Iron used to be a commonly applied catalyst in hydrogenation of nitroarenes [9][10][11], but was restricted due to relatively low catalytic ability and environmental pollution. With regard to heterogeneous liquid-phase catalytic hydrogenation of these compounds, Pt-based catalysts are often used and supports are of varieties [6][7][8]12,13]. For instance, carbon materials supported Pt nanoparticles were active in hydrogenation of both benzaldehyde and nitrobenzene [7,12].…”

Section: Introductionmentioning

confidence: 99%

Pt nanoparticles entrapped in mesoporous metal–organic frameworks MIL-101 as an efficient catalyst for liquid-phase hydrogenation of benzaldehydes and nitrobenzenes

et al. 2015

Journal of Molecular Catalysis A: Chemical

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“…[6][7][8][9][10][11][12][13][14][15][16][17][18][19] These catalytic processes frequently requirethe use of organic solvents and thea id of additives( base and metal salts) in liquid-phase reaction systems, causing variouss econdary pollution troubles. On the other hand, in mostc ases, Ni or Pt catalysts can afford high catalytic activityf or theh ydrogenation of nitro aromaticsw ith H 2 ,b ut they lack the necessary chemoselectivity when other reducible functional groups such as alkene, nitrile, carbonyl, hydroxyl,a nd halidesa re presenti nt he same molecule; [20][21][22] Au and Ag catalysts exhibit excellent chemoselectivity,b ut poor catalytic activity owing to their low ability for H 2 activation. [23][24][25] Therefore, there is as trong incentive to develop highly active and recyclable heterogeneous catalysts that do not require solvents and additives, and can quantitativelyh ydrogenate functional nitroarenes to the corresponding aromatic amineswith H 2 .…”

Section: Introductionmentioning

confidence: 99%

High Performance and Active Sites of a Ceria‐Supported Palladium Catalyst for Solvent‐Free Chemoselective Hydrogenation of Nitroarenes

et al. 2017

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Cerium oxide‐supported palladium catalysts (Pd/CeO2) prepared by a simple impregnation method exhibit exciting catalytic activity and high chemoselectivity for the solvent‐free hydrogenation of a variety of substituted nitroarenes including the reducible functional groups to the corresponding aromatic amines under mild reaction conditions. Taking nitrobenzene as an example, the Pd/CeO2 catalyst can afford aniline yields of >99 % with turnover frequencies as high as 11 411 h−1 and 69 824 h−1 at 40 °C and 100 °C, respectively. Pd2+ ion species exist as isolated single atoms with −Pd2+−O2−−Ce4+− linkages on the surface of PdxCe1−xO2−σ solid solution and are found to be active sites for the selective hydrogenation of nitroarenes in the absence of solvent. The superior catalytic performance can be attributed to the cooperative effect between Pd2+ ions and unique surface sites of CeO2. A possible mechanism is proposed for the hydrogenation of nitroarenes with H2 over the Pd/CeO2. The Pd/CeO2 catalyst can be recovered easily and reused for at least seven recycling reactions without loss of catalytic properties.

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Microreactor containing platinum nanoparticles for nitrobenzene hydrogenation

Cited by 62 publications

References 30 publications

Metallic nanoparticles made in flow and their catalytic applications in organic synthesis

Metallic nanoparticles made in flow and their catalytic applications in organic synthesis

Pt nanoparticles entrapped in mesoporous metal–organic frameworks MIL-101 as an efficient catalyst for liquid-phase hydrogenation of benzaldehydes and nitrobenzenes

High Performance and Active Sites of a Ceria‐Supported Palladium Catalyst for Solvent‐Free Chemoselective Hydrogenation of Nitroarenes

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