International Journal of Engineering Research in Electronics and Communication Engineering

Synthesis and Electrochemical studies of Polyaniline at Different Atmospheric Condition

Author : P.Rajakani ¹ C.Vedhi ²

Date of Publication :20th April 2018

Abstract: Electroconducting polyaniline (PAni) are of great interest for a large number of applications due to their easy processing and relatively low cost compared to other materials such as the inorganic one. The PAni was synthesized by bulk polymerization of aniline using 0.25M potassium perdisulfate (K2S2O8) as an oxidant at room temperature, in 1M hydrochloric acid medium. The Cyclic Voltammetric studies (CVs) are obtained in 1.0 M H2SO4 electrolyte by casting the PAni paste on GC working electrode. The effect of pH on the voltammetric response is studied to determine the electroactive behaviour of PAni modified GCE in redox reactions over a pH range of 1.0 to 13.0. CVs of PAni modified GCE were performed under different atmospheric conditions (deareated, O2 & N2) in the pH 1.0. The surface coverage values as well as the diffusion coefficient values are found from Chronoamperograms of the PAni modified GCE by Cyclic voltammetric method. PAni modified GCE enhances the electrocatalytic activity towards methanol reduction for N2 saturated buffer. The double layer capacitance value calculated from Electrochemical Impedence Spectroscopy

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