Synthesis of palladium nanostructures by spontaneous electroless deposition

Palladium nanostructures are prospective in various applications of hydrogenation products. In this Letter, we demonstrate that three different types of palladium nanostructures can be synthesized simultaneously at the surface of porous stainless steel substrate by an electroless deposition process. The palladium nanowires and nanoparticle-monolayer membranes are governed without any external field except an autocatalytic chemical reaction. This discovery provides a new method to fabricate palladium nanostructures for engineering applications.