Palladium Nanocrystals act as excellent catalysts for reactions, in synthetic organic chemistry and many other applications such as environmental catalysts [1]. They are also anticipated as hydrogen storage media for hydrogen fuel cells [1,2]. For this, the size of the nanocrystals has to be rather small and the coating agent has to be efficient enough to prevent coalescence [3]. In this article, a green facile synthesis of starch-capped Pd nanocrystals via a novel method is reported. The as synthesized Pd nanocrystals were characterized using UV-Vis spectrophotometry, SEM, and XRD techniques. The Pd nanocrystals were synthesized by the reduction of Pd2- ions in the aqueous ascorbic acid. The approach was quite simple and straightforward. In a typical preparation, a 100 μl of 0.17 M solution of H2PdCl4 was added a 0.2% (wt) aqueous solution of soluble starch and 20 ml ascorbic acid. After complete dissolution of these components and keeping it in 80 °C for 3h, were obtained a black aqueous solution. We have reported a simple route for the synthesis of relatively monodisperse Pd nanoparticles, reduced by ascorbic acid and stabilized by soluble starch. The Pd nanoparticles stabilized with soluble starch are found to be stable in solution over a period of six months at room temperature. The average nanoparticles size was obtained 18nm.
