Electrochemical sensing of hydrogen peroxide based on nano γ-Fe2O3 modified glassy carbon electrode

Abstract

Maghemite (γ-Fe₂O₃) nanoparticles were prepared using chemical synthesis method and used for sensing the hydrogen peroxide. The morphology of the γ-Fe₂O₃ nanoparticles was characterized by scanning electron microscopy. The γ-Fe₂O₃ nanoparticles were used to modify glassy carbon electrode (GCE) to form nano γ-Fe₂O₃ modified GC electrode for electrochemical sensing of hydrogen peroxide (H₂O₂). A potential controlled cyclic voltammetric (CV) technique was performed to sense hydrogen peroxide using nano γ-Fe₂O₃ modified GC electrode. The nano γ-Fe₂O₃ modified GC electrode showed excellent electrocatalytic ability towards H₂O₂in 0.1M KCl supporting electrolyte. A significant enhancement in anodic peak current was observed for the nano γ-Fe₂O₃ modified GC electrode than those of bare electrode. The electrochemical characteristics of hydrogen peroxide on nano γ-Fe₂O₃ modified GC electrode had been explored in this research communication.