Unit:
Κατεύθυνση Ομογενής ΚατάλυσηLibrary of the School of Science
Supervisors info:
Κ. Μεθενίτης Αναπλ. Καθηγητής
Original Title:
Σύνθεση και Χαρακτηρισμός Νανοσωματιδίων Pd(0) Σταθεροποιημένων από το Συμπολυμερές Πολυ (στυρενιο-co-4-βινυλοβενζυλο χλωρίδιο)-Ν-Lαλανίνη. Μελέτη της Καταλυτικής Ενεργότητας στην Ετερογενή Υδρογόνωση του Κυκλοεξενίου.
Translated title:
Synthesis and Characterization of Pd (0) Nanoparticles Stabilized by Copolymer poly-(styrene-co-4 vinyl benzyl chloride)-N-L alanine. A Study of Catalytic Activity in Heterogeneous Hydrogenation of Cyclohexene.
Summary:
In this work we focus on the synthesis and characterization of Pd(0)
nanoparticles supported on copolymer poly-(styrene-co-4 vinyl benzyl
chloride)-N-L alanine (P(ST-co-4VBCAla)). The precursor used for the synthesis
of nanoparticles is the complex Pd(II) with the copolymer. Sodium borohydride
was used for Pd reduction (NaBH4). Fourier Transform Infrared Spectroscopy
(FTIR), Nuclear Magnetic Resonance Spectroscopy (NMR), Spectroscopy Scanning
Electron Microscopy (SEM) and X-ray Diffraction (XRD) were used to characterize
the Pd(0) nanoparticles. It was proven that Pd(0) nanoparticles are stabilized
only in the presence of the copolymer. The content of copolymer–Pd(0) system
is 52% in palladium. The stabilized Pd nanoparticles proved to be active
catalysts for the hydrogenation of cyclohexene. Catalytic reactivity was
studied in different temperature, pressure, catalyst and olefinic substrate
quantity. T.O.N. from 95 to 3033 mol sub. / molPd(0) and T.O.F. from 43 to
1189,7 catalytic cycles per hour were calculated,at the time that the reaction
was completed and in a period time of 50 minutes for each parameter.
Keywords:
Heterogeneous Catalysis, Hydrogenation, Nanoparticles, Palladium, Cyclohexene
