Nitrogen-Doped Glassy Carbon Electrodes Prepared by Stepwise Electrolysis for Hydrogen Peroxide Determination

Abstract

An amperometric determination based on flow injection analysis (FIA) of hydrogen peroxide was first developed using nitrogen-doped glassy carbon electrodes prepared by stepwise electrolysis as the working electrode. A glassy carbon electrode was covalently modified by electrochemical oxidation/reduction procedures. The electrocatalytic activity for the electrode oxidation of hydrogen peroxide has successfully been applied to the FIA of hydrogen peroxide. The typical current vs. time curve was obtained by the repetitive measurement of 20 µM hydrogen peroxide and when flow rate is 2.0 ml/min, the measurement of hydrogen peroxide was finished completely in a short time (10 sec.).