The effect of supporting electrolytes of polyaniline/graphene nanocomposite modified electrode by electrochemical impedance spectroscopy

Electrosynthesis of polyaniline/graphene nanocomposite in phosphoric acid solution in presence Potassiumchloride (KCl) and Para toluene sulfonic acid (PTSA) as supporting electrolytes is carried out. Both the potassiumchloride electrolyte and Para toluene sulfonic acid electrolyte at different molar ratios are synthesized on compositegraphite electrode. The formation of the nanocomposites has been confirmed by scanning electron microscopy and theenergy dispersive x-ray spectroscopy. The electrochemical performance of the electrode materials has been demonstratedby cyclic voltammetry and electrochemical impedance spectroscopy. The electrochemical impedance spectroscopy (EIS)illustrates that as more PTSA are available in solution the charge transfer resistance is decreased and the conductivity ofpolyaniline/graphene nanocomposite modified electrode is increased.

کلیدواژه ها:

polyaniline ، graphene ، Potassium chloride ، Potassium chloride ، electrochemical impedance spectroscopy