Efficient and recyclable carbon-supported Pd nanocatalysts for the Suzuki–Miyaura reaction in aqueous-based media: Microwave vs conventional heating

Authors: Eduardo J. García-Suárez, Patricia Lara, Ana B. García, Manuel Ojeda, Rafael Luque, Karine Philippot

Abstract:
Three new hybrid nanocatalysts based on carbon-supported Pd nanoparticles (NPs) were prepared by decomposition of an organometallic palladium precursor under H2 atmosphere in the presence of carbon materials with different surface and textural properties. The so-obtained Pd NPs displayed mean sizes in the range of 2–2.5 nm. The hybrid nanocatalysts were evaluated in the aqueous Suzuki–Miyaura crosscoupling reaction under both conventional and microwave heating. Excellent activities were obtained at short reaction times (5–10 min) reaching TOF values up to 3000 h−1 under microwave radiation. Recycling studies showed that the nanocatalysts could be re-used up to 10 (conventional heating) and to 5 (microwave irradiation) reaction cycles without any loss of activity. The reaction media was found to have a strong influence on the recyclability ofthe nanocatalysts, which could be improved in the presence of polyethylene glycol.

Keywords:
Palladium nanoparticles
Heterogeneous catalysts
Microwave heating
Suzuki cross-coupling
Carbon materials

Published in: Applied catalysis A: General   (Volume 468, Pages 1-474, 5 November 2013)

Publisher: Elsevier  

ISSN Information: 0926-860X

Efficient and recyclable carbon-supported Pd nanocatalysts for the Suzuki–Miyaura reaction in aqueous-based media: Microwave vs conventional heating

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