Synthesis of Marks-Decahedral Pd Nanoparticles in Aqueous Solutions

The synthesis of Marks-decahedral Pd NCs through a one-step hydrothermal method was reported. PdCl2 and PVP were added into water with stirred for 10 min. The resulting homogeneous orange red solution was transferred to a 20-mL Teflon-lined stainless-steel autoclave. The container was then sealed in a stainless-steel bomb. The whole system was heated and maintained in an oven at 160°C under autogenous pressure for 16 h. After the reaction finished, the container was cooled under room temperature conditions naturally. Finally, a solution of Pd particles with taupe color was obtained. The products were separated via centrifugation and further purified twice by deionized water. Then, the products were dispersed with ethanol. When the reaction time increases from 4 to 16 h, the yield rate of Marks-decahedral Pd nanoparticles varies in the range from 30% to 35%. Yield rate will change with increasing of reaction time on condition that the growth-mediated mechanism controls the formation of Marks decahedra.