Influence of Monomer Concentration on Capability of Voltammetric Polypyrrole Based Cation Sensor Using Modified Butler-Volmer Equation

Abstract

In this work, a modified Butler-Volmer equation is used to determine capability of voltammetric ion sensor based on modified PPy/DBS electrode. This method shows a direct relationship between mid point reversible potential (ER) and the logarithm of the electrolyte concentration. Slopes from Butler-Volmer equation include electron-transfer coefficient. Modified PPy/DBS electrode was successfully applied as voltammetric cation sensor. It was shown that the capability of the sensor depends on the quality of formed polypyrrole film which is dependent on the initial monomer concentration.