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Preparation of Palladium-Supported Periodic Mesoporous Organosilicas and their Use as Catalysts in the Suzuki Cross-Coupling Reaction

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Author
Corral, Jorge A.
López, María I.
Esquivel, Dolores
Mora, Manuel
Jiménez-Sanchidrián, César
Romero-Salguero, F.J.
Publisher
MDPI
Date
2013
Subject
Periodic mesoporous organosilica
Palladium nanoparticles
Hydrogen chemisorption
Temperature programmed reduction
Pd-supported catalysts
Suzuki cross-coupling
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Abstract
Three periodic mesoporous materials, i.e., two organosilicas with either ethylene or phenylene bridges and one silica, have been used as supports for Pd nanoparticles. All Pd-supported samples (1.0 wt%) were prepared by the incipient wetness method and subsequently reduced in an H2 stream at 200 °C. Both hydrogen chemisorption and temperature programmed reduction experiments revealed significant differences depending on the support. Pd2+ species were more reducible on the mesoporous organosilicas than on their silica counterpart. Also, remarkable differences on the particle morphology were observed by transmission electron microscopy. All Pd-supported samples were active in the Suzuki cross-coupling reaction between bromobenzene and phenylboronic acid
URI
http://hdl.handle.net/10396/15399
Fuente
Materials 6(4), 1554-1565 (2013)
Versión del Editor
http://dx.doi.org/10.3390/ma6041554
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