Characterization of polymer stabilized silver nanoparticles modified glassy carbon electrodes for electroanalytical applications

Nafion®stabilized silver nanoparticles modified Glassy Carbon electrodes were prepared with a verysimple procedure depositing onto the Glassy Carbon support a suspension of nanomaterials in Nafion ®.Electrodes were characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy(EIS), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Stability inair and in solution and repeatability were evaluated.The modified electrodes show promising electroanalytical performances due to the increase of theeffective surface area, to a formation of a random array of nanoparticles on the Nafion ®three-dimensionalsubstrate with intermediate diffusional behaviour between planar and convergent, and to a very smalldouble layer capacitance. Applications exploiting the electrocatalytic properties of Ag for the detectionof two chlorinated compounds (dichloromethane and halothane) are presented.