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Palladium nanoparticles immobilized on halloysite nanotubes covered by a multilayer network for catalytic applications

  • Autori: Massaro, M.; Colletti, C.; Buscemi, G.; Cataldo, S.; Guernelli, S.; Lazzara, G.; Liotta, L.; Parisi, F.; Pettignano, A.; Riela, S.
  • Anno di pubblicazione: 2018
  • Tipologia: Articolo in rivista (Articolo in rivista)
  • OA Link:


The synthesis of pure fine chemicals for industrial purposes is one of the most attractive challenges of chemical research. The use of catalytic pathways mediated by palladium nanoparticles (PdNPs) for C-C bond formation is a useful way to obtain these kinds of compounds. To achieve this objective, the PdNPs can be efficiently loaded on a functionalized natural nanostructured support such as halloysite nanotubes (HNTs). Hybrid materials based on thiol functionalized halloysite nanotubes and highly cross-linked imidazolium salts were successfully developed and used for the stabilization of PdNPs. The HNT/Pd hybrids were thoroughly characterized from a physico-chemical point of view and tested as a catalyst in the Suzuki and Heck C-C coupling reactions under microwave irradiation to obtain innovative materials for fine chemicals synthesis. Catalytic tests highlighted the fact that the HNT/Pd hybrids show high performance and full recyclability (up to ten cycles) in both reactions. Regarding the Suzuki reaction, under the best experimental conditions, the remarkable values of a turnover number of 194 000 and a turnover frequency of 3 880 000 h-1 were achieved without metal contamination in the final products. © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.