Factors affecting activity and selectivity during cyclohexanone hydrogenation with colloidal platinum nanocatalysts

Manbeck, Kimberly A.; Musselwhite, Nathan; Carl, Lindsay M.; Kauffman, Carrie A.; Lyons, Oliver D.; Navin, Jason K.; Marsh, Anderson L.

doi:10.1016/j.apcata.2010.06.007

Cited by 15 publications

(7 citation statements)

References 33 publications

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“…Several methods are available in the literature for the synthesis of platinum nanoparticles such as physical methods [96], solvothermal [97] and hydrothermal [98] approaches, sol-gel [99], and an electrodeposition [100] process. The morphology and properties of a platinum-based nanomaterial such as optical, magnetic, and catalytic properties can be tailored by changing the starting material and reaction parameters [101]. Narayanan and El-Sayed reported the Suzuki reaction between iodobenzene and phenylboronic acid to catalyze using platinum nanocatalysts (Scheme 13) [102].…”

Section: Platinum-basedmentioning

confidence: 99%

Recent Developments in Nanostructured Palladium and Other Metal Catalysts for Organic Transformation

Hussain

Kamal

Hossain

2019

Journal of Nanomaterials

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Nanocatalysis is an emerging field of research and is applicable to nearly all kinds of catalytic organic conversions. Nanotechnology is playing an important role in both industrial applications and academic research. The catalytic activities become pronounced as the size of the catalyst reduces and the surface area-to-volume ratio increases which ultimately enhance the activity and selectivity of nanocatalysts. Similarly, the morphology of the particles also has a great impact on the activity and selectivity of nanocatalysts. Moreover, the electronic properties and geometric structure of nanocatalysts can be affected by polar and nonpolar solvents. Various forms of nanocatalysts have been reported including supported nanocatalysts, Schiff-based nanocatalysts, graphene-based nanocatalysts, thin-film nanocatalysts, mixed metal oxide nanocatalysts, magnetic nanocatalysts, and core-shell nanocatalysts. Among a variety of different rare earth and transition metals, palladium-based nanocatalysts have been extensively studied both in academia and in the industry because of their applications such as in carbon-carbon cross-coupling reactions, carbon-carbon homocoupling reactions, carbon-heteroatom cross-coupling reactions, and C-H activation, hydrogenation, esterification, oxidation, and reduction. The current review highlights the recent developments in the synthesis of palladium and some other metal nanocatalysts and their potential applications in various organic reactions.

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Section: Platinum-basedmentioning

confidence: 99%

Recent Developments in Nanostructured Palladium and Other Metal Catalysts for Organic Transformation

Hussain

Kamal

Hossain

2019

Journal of Nanomaterials

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“…The high surface area to volume ratio (S/V) attained by decreasing the size of the catalyst material specifically engineered at the nanoscale renders increased catalytically active site, thereby promoting enhanced interaction between the reactants and the catalyst [98]. Nanosized catalysts additionally display unique properties in comparison to the ones at macroscale and combine the positive aspects of conventional catalytic methods [99,100,101,102], pursuing the key targets close to 100% of selective reactions with extremely high activity and excellent yield [103]. Nanocatalysis is expected to concomitantly lower pyrolysis process energy consumption, impart longer lifetime to the catalyst system with greater chances of isolation and reusability of the active nanostructured catalyst [104].…”

Section: Introductionmentioning

confidence: 99%

Non-biodegradable polymeric waste pyrolysis for energy recovery

Dwivedi

Mishra

Mondal

et al. 2019

Heliyon

111

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Nowadays, increasing population, widespread urbanization, rise in living standards together with versatile use of polymers have caused non-biodegradable polymeric wastes affecting the environment a chronic global problem, simultaneously, the existing high energy demand in our society is a matter of great concern. Hence forth, this review article provides an insight into the technological approach of pyrolysis emphasizing catalytic pyrolysis for conversion of polymeric wastes into energy products and presents an alternative waste management technique which is a leap towards developing sustainable environment. Pyrolysis of waste non-biodegradable polymer materials involves controlled thermal decomposition in the absence of oxygen, cracking their macromolecules into lower molecular weight ones, resulting into the formation of a wide range of products from hydrogen, hydrocarbons to coke. Nanocatalyzed pyrolysis is a recommended solution to the low thermal conductivity of polymers, promoting faster reactions in breaking the CC bonds at lower temperatures, denoting less energy consumption and enabling enhancement in the process selectivity, whereby higher value added products are generated with increased yield. Nanotechnology plays an indispensable role in academic research as well as in industrial applications. Existing reviews illustrate that one of the oldest application field of nanotechnology is in the arena of nanocatalysis. Nanocatalysis closes the gap between homo and heterogeneous catalyses while combines their advantageous characteristics and positive aspects, reducing the respective drawbacks. During the current nanohype, nanostructured catalysts are esteemed materials and their exploration provide promising solutions for challenges from the perspective of cost and factors influencing catalytic activity, due to their featured high surface area to volume ratio which render enhanced properties with respect to the bulk catalyst.

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“…The 3.6 nm PVP-capped platinum nanocatalysts were prepared by a seeded growth method. ,, First, 2.9 nm Pt nanocatalysts were made by an alcohol reduction method containing aqueous H 2 PtCl 6 ·6H 2 O (20.0 mL, 6.0 mM), 180 mL of methanol, and 133 mg of PVP and refluxed for 3 h. The freshly prepared 2.9 nm Pt particles were dispersed in 100 mL of 90% methanol. Aqueous H 2 PtCl 6 ·6H 2 O (10.0 mL, 6.0 mM) and methanol (90 mL) were added to the Pt colloidal solution and refluxed for 3 h. For 7.1 nm particles, glycol solutions of PVP (3 mL, 0.375 M) and H 2 PtCl 6 ·6H 2 O (1.5 mL, 0.0625 M) were added to boiling ethylene glycol (2.5 mL) alternatively every 30 s for 16 min.…”

Section: Methodsmentioning

confidence: 99%

“…Hydrogenation reactions were performed in a Parr 4566 mini benchtop reactor . The reactor was charged by adding a selected amount of the Pt nanocatalyst to a known amount of cyclohexanone (Aldrich, 99.8%) dissolved in water to give a cyclohexanone to Pt mole ratio of 1000 to 1.…”

Section: Methodsmentioning

confidence: 99%

Synthesis, Characterization, and Reaction Studies of a PVP-Capped Platinum Nanocatalyst Immobilized on Silica

et al. 2010

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An immobilized platinum nanocatalyst was prepared by first functionalizing the surface of activated silica with poly(vinylpyrrolidone) (PVP) and then reducing encapsulated platinum ions in the presence of these functionalized supports to form nanoparticles. Surface functionalization was monitored by infrared spectroscopy and surface area measurements, and the resulting nanocatalyst was characterized using transmission electron microscopy (TEM) and X-ray diffraction (XRD). Platinum nanoparticle size was determined to be approximately 5 nm based on TEM and XRD measurements. Catalytic activity of this material for the hydrogenation of cyclohexanone was found to be greater than that of unsupported colloidal PVP-capped platinum nanocatalysts. In addition, the immobilized nanocatalyst displayed no change in activity after being recycled. Taken together, these results clearly indicate advantages in the design of catalytic materials with desired properties.

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Factors affecting activity and selectivity during cyclohexanone hydrogenation with colloidal platinum nanocatalysts

Cited by 15 publications

References 33 publications

Recent Developments in Nanostructured Palladium and Other Metal Catalysts for Organic Transformation

Recent Developments in Nanostructured Palladium and Other Metal Catalysts for Organic Transformation

Non-biodegradable polymeric waste pyrolysis for energy recovery

Synthesis, Characterization, and Reaction Studies of a PVP-Capped Platinum Nanocatalyst Immobilized on Silica

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