Electrochemical rebuilding of pure gold surface into flower-like nanostructured gold films

Abstract A facile, green method has been developed to fabricate a three-dimensional (3D) flower-like nanostructured gold film (FNGF) by anodization of pure gold substrate in a mixed solution containing potassium chloride (KCl) and ascorbic acid (AA). The formation of FNGFs might be related to three main interfacial processes: gold electrodissolution, chemical reduction of AuCl 4 − , and self-assembly of gold nanoparticles (Au NPs). The effects of step potentials and time on film roughness have also been investigated. The as-prepared 3D FNGF exhibits high electrocatalytic activities toward the glucose oxidation and hydrogen peroxide reduction in comparison with the Au NP modified glass carbon (GC) electrode.