Electrodeposition of three-dimensional porous platinum film on removable polyaniline template for high-performance electroanalysis

Three-dimensional porous platinum (Pt-por) films are prepared based on Pt electrodeposition on polyaniline (PANI) modified electrodes followed by selective dissolution of PANI with HNO3. Electrochemical quartz crystal microbalance data suggest that the PANI-H2PtCl6 interaction involves redox and coordination reactions, depending on the working potential. The Pt-por shows better electrocatalytic performance than the Pt/PANI and conventionally electro-deposited Pt. The Pt-por modified glassy carbon electrode (GCE) can electrocatalyze the oxidation of H2O2 with a sensitivity of 414 mu A cm(-2) mM(-1) and a detection limit of 9 nM, and the chitosan-glucose oxidase/Pt-por/GCE can sense glucose with a sensitivity of 93.4 mu A cm(-2) mM(-1).