Ni nanowire supported 3D flower-like Pd nanostructures as an efficient electrocatalyst for electrooxidation of ethanol in alkaline media

► Schematic of fabrication route for Pd nanoparticle or nanoflowers on Ni nanowire. ► Electron microscopy image of 3D flower-like Pd nano-electrocatalyst on Ni nanowires. ► Exhibits large active surface area and excellent electrocatalytic activity. ► The nano-heterostructure shows high level of the poisoning tolerance.