Structure consideration of platinum nanoparticles constructing nanostructures obtained by electrochemical dealloying of a Cu-Pt alloy.

Many nanoporous metals have been applied for catalysis and show active properties. In this study, nanoporous platinum was successfully prepared from a Cu-Pt (50/50 w/w) alloy plate by electrochemical dealloying. In order to reveal their detailed structures in nanometer order, TEM observation of the surface area of the alloy plate was performed by using focused ion beam (FIB) for sample preparation. Peeling off the surface platinum nanoparticles could be also successfully preformed by using ultra sonification and their TEM observation revealed the units of the platinum nanoporous structures.