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Stabilized heterogeneous Palladium nanoparticles: Designing and applications in some aqueous organic transformations

Abstract

 Pd based catalyst, especially Pd (0) nanoparticles, is very well known and fascinating for carrying out number of organic transformations. However, the major disadvantage is the formation of less active large aggregates as well as Pd-black, responsible for the deactivation of the catalyst. To prevent such problems, the challenge is to synthesize stable catalysts via using stabilizing agents. Number of various stabilizing agents such as (C8H17)4N+Br-, Poly (N-vinyl-2-pyrrolidone) (PVP), Hydroxyl-Terminated Poly (amido-amine) (PAMAM) dendrimers and natural organic extracts are used. Recently polyoxometalates are gaining attention as excellent stabilizing agents due to their number of convergent properties. The present work reveals a simple methodology for synthesizing the highly stabilized Pd (0) nanoparticles using supported 12-tungstophosphoric acid as a stabilizer as well as a carrier.

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