Improved size control of large palladium nanoparticles by a seeding growth method

A new approach to the preparation of large palladium nanoparticles with diameters between 25 and 100 nm is presented. In this approach PdCl42− ions are reduced on the surface of performed 12-nm-diameter gold “seeds” by the introduction of ascorbic acid. The resultant particles exhibit improved monodispersity relative to previous work. Interestingly, these nanoparticles possess Au–Pd core–shell structures. The method can be scaled up to produce 50–110 mg of large palladium nanoparticles.