Abstract
Palladium nanoparticles (Pd NPs) play an important role as catalysts in various chemical reactions. In this paper, a new strategy is developed to synthesize thin films of biomolecule-supported metallic palladium nanoparticles by the alternative deposition of insulin fibrils and aged sodium tetrachloropalladate (II) on a solid substrate in the absence of any external reducing agents. The formation of metal Pd NPs was confirmed by high resolution transmission electron microscopy and X-ray photoelectron spectroscopy. The unique Pd-insulin exhibits extremely high catalytic activity in Suzuki coupling reactions at a very low Pd loading of 5.0 x 10(-2) mol%. (C) 2015 Published by Elsevier B.V.
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