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

E.J. Garcia-Suarez , Patricia Lara (1) , A.B. García (2) , M. Ojeda (2) , R. Luque (3) , Karine Philippot (1)

1 LCC - Laboratoire de chimie de coordination
2 CSIC - Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain]
3 Universidad de Córdoba = University of Córdoba [Córdoba]

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 cross-coupling 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 of the nanocatalysts, which could be improved in the presence of polyethylene glycol.

Mots clés: Palladium nanoparticles; Heterogeneous catalysts; Microwave heating; Suzuki cross-coupling; Carbon materials

Domaines: Chimie de coordination

E.J. Garcia-Suarez, Patricia Lara, A.B. García, M. Ojeda, R. Luque, et al.. Efficient and recyclable carbon-supported Pd nanocatalysts for the Suzuki-Miyaura reaction in aqueous-based media: Microwave vs conventional heating. Applied Catalysis A : General, 2013, 468, pp.59-67. ⟨10.1016/j.apcata.2013.08.036⟩. ⟨hal-00994531⟩