Rh and Pd Nanoparticles Supported in a Polymeric Membrane: Evaluation in Hydrogenation and Suzuki-Miyaura Reactions

Oliveira, Deyvid G. M.; Rosa, Gilber R.; Scheeren, Carla Weber

doi:10.1166/jnn.2017.13884

Cited by 2 publications

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“…The applied synthesis procedure was based on the sol-gel technique using triethanol amine as a small-size template. The exact synthesis procedure was adapted by the method developed by Hamdy et al in [12,16]. In the exact synthesis procedure, a solution of rhodium (III) nitrate hydrate (Rh(NO 3 ) 3 •xH 2 O, Sigma-Aldrich) was mixed with a dilute solution of triethanol amine (TEA, 97%, ACROS).…”

Section: Methodsmentioning

confidence: 99%

“…Few bio-based supports were used to accommodate the noble metal nanoparticles. Oliveira et al [12] used cellulose acetate membranes to support palladium and rhodium nanoparticles, and the prepared catalysts exhibited a high activity in cyclohexene hydrogenation. Moreover, Ghadamgahi et al [13] reported recently the use of palladium nanoparticles supported on wool in the hydrogenation of cyclohexene under elevated temperature and pressure.…”

Section: Introductionmentioning

confidence: 99%

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Rhodium Nanoparticles Incorporated Mesoporous Silica as an Active Catalyst for Cyclohexene Hydrogenation under Ambient Conditions

et al. 2020

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Rhodium (Rh) nanoparticles were embedded in the mesopores of TUD-1 siliceous material and denoted as Rh-TUD-1. Five samples of Rh-TUD-1 were prepared with different loadings of Rh that ranged from 0.1 to 2 wt% using the sol-gel technique. The prepared samples were characterized by means of several chemical and physical techniques. The obtained characterization results show the formation of highly distributed Rh0 nanoparticles with an average size ranging from 3 to 5 nm throughout the three-dimensional silica matrix of TUD-1. The catalytic activity of the prepared catalysts was evaluated in the solvent-free hydrogenation of cyclohexene to cyclohexane at room temperature using 1atm of hydrogen gas. The obtained catalytic results confirm the high activity of Rh-TUD-1, in which a turn over frequency (TOF) ranging from 4.94 to 0.54 s−1 was obtained. Moreover, the change in reaction temperature during the reaction was monitored, and it showed an obvious increase in the reaction temperature as an indication of the spontaneous and exothermic nature of the reactions. Other optimization parameters, such as the substrate/catalyst ratio, and performing the reaction under non-ambient conditions (temperature = 60 °C and hydrogen pressure = 5 atm) were also investigated. Rh-TUD-1 exhibited a high stability in a consecutive reaction of five runs under either ambient or non-ambient conditions.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%