Metallic Nanocages: Synthesis of Bimetallic Pt–Pd Hollow Nanoparticles with Dendritic Shells by Selective Chemical Etching

Abstract

We report a facile synthesis of Pt–Pd bimetallic nanoparticles, named “metallic nanocages”, with a hollow interior and porous dendritic shell. This synthesis is easily achieved by selective chemical etching of Pd cores from dendritic Pt-on-Pd nanoparticles. The obtained Pt–Pd nanocages show superior catalytic activity for methanol oxidation reaction compared to other Pt-based materials reported previously