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Palladium metal nanoparticles on organically modified thin hybrid films

Paper ID Volume ID Publish Year Pages File Format Full-Text
51740 46852 2009 6 PDF Available
Title
Palladium metal nanoparticles on organically modified thin hybrid films
Abstract

Hybrid thin films containing palladium nanoparticles in different concentrations (0.5% and 1%) with and without nanoparticle stabiliser agent [mercaptopropyl trimethoxysilane, MPTMS] were prepared using a sol–gel process. Pd nanoparticles were found to be highly dispersed on the thin films with particles ranging from 7 to 10 nm. The catalytic properties of the thin films supported Pd nanoparticles were investigated in the Heck reaction of iodobenzene and methyl acrylate. Films containing Pd MNP (with and without MPTMS) gave quantitative conversion and complete selectivity to the targeted product (methyl cinnamate) in a short time of reaction (<15 min) under microwave irradiation. While Pd containing films without MPTMS were highly active and reusable after 3 runs, MPTMS containing films were found to be inactive after the first use. Such phenomenon was correlated to the steric hindrance round the Pd MNP due to the adsorption of species on the surface that render the catalysts inactive.

Keywords
Sol–gel process; Hybrid films; Palladium; Metal nanoparticles; Catalytic properties
First Page Preview
Palladium metal nanoparticles on organically modified thin hybrid films
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 10, Issue 4, 10 January 2009, Pages 395–400
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis