6 research outputs found
Shell tailoring of coreâshell nanoparticles for heterogeneous catalysis
In this study, platinum coreâpalladium shell nanoparticles have been synthesized by a chemical method with the shell thickness controlled to submonolayer precision. A single palladium monolayer has been prepared on platinum nanoparticles by chemically-driven underpotential deposition in a batch reactor with a redox buffer. The platinum coreâpalladium shell nanoparticles studied exhibit the highest electrocatalytic properties toward formic acid oxidation when the shell is only one monolayer thick, which underlines the need for precise control of the shell thickness for applications in heterogeneous catalysis. In this study we demonstrate that chemical methods allow for easy preparation of large quantities of coreâshell nanoparticles in batch reactors, where the shell thickness can be tailored from 1 to 10 monoatomic layers