Electroc hemical study and characterization of copolyaniline/Ag nanocompo sites as co nducting polymer in fuel cel ls

Among the whole conducting polymers, p olyaniline (PANI) has a specific situation beca use of it’s si mply synthesis, environmental stability, and doping with protonic acids [۱]. Polyaniline (PANI) is a very popular con ductive polymer which has been re-discovere d in recent years. Deep studies have better clarified its chemical structure with different oxidation states which can as sume under different conditions [۲]. Recently, the synthesis of electrically condu cting polymers such as polyaniline (PANI) and its derivatives has received a considerable atte ntion owing to their various techno logical applications . The composites of cond ucting polymers, such a s polyanilin e (PANI), with noble metals find applications in electroc atalysis, cata lysis, design of fuel-cell electrodes, sensors, co nducting printing inks, recovery of n oble metals, etc. The f irst method has only been used ex ceptionally for modifyi ng silver nanoparticles with PANI or substituted PANI. Composites of silver and PANI have been prepa red by the s econd technique, by the direct reduction of silver nitrate with PANI or PANI derivatives. The incorporation of metal nanoparticles could effectively improve the electrical, optical and dielectric properties of the polyaniline co mposites [۳].

کلیدواژه ها:

cycli c voltammetry ، copolyaniline/Ag ، electrochemical impedance spectroscopy (EIS) ، nanocomposites ، SEM ، DSC