Nafion (R) stabilized silver nanoparticles modified Glassy Carbon electrodes were prepared with a very simple procedure depositing onto the Glassy Carbon support a suspension of nanomaterials in Nafion (R). Electrodes were characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Stability in air and in solution and repeatability were evaluated. The modified electrodes show promising electroanalytical performances due to the increase of the effective surface area, to a formation of a random array of nanoparticles on the Nafion (R) three-dimensional substrate with intermediate diffusional behaviour between planar and convergent, and to a very small double layer capacitance. Applications exploiting the electrocatalytic properties of Ag for the detection of two chlorinated compounds (dichloromethane and halothane) are presented. (C) 2013 Elsevier Ltd. All rights reserved.