In this paper, nanoporous platinum films with an enhanced surface area wereobtained through a facile route by selective anodic dissolution of Cu from PtCualloy. A homogeneous PtCu alloy was electrochemically deposited at a glassycarbon electrode at room temperature, then Cu was electrochemically etchedfrom the PtCu alloy resulting in the fabrication of a nanoporous platinum filmwith a much higher surface area. The surface area of the dealloyed nanoporousplatinum film was highly enhanced by up to 500 times compared with that of apolycrystalline platinum electrode. This nanoporous platinum film exhibited highstability and remarkable catalytic activity for oxygen electro-reduction and methanolelectro-oxidation, with promising applications in fuel cells and biosensors, etc.