Synthesis of Prussian Blue and Its Electrochemical Detection of Hydrogen Peroxide Based on Cetyltrimethylammonium Bromide (CTAB) Modified Glassy Carbon Electrode

This paper reports on the modification of glassy carbon electrode with both Prussian blue (PB) and cetyltrimethylammonium bromide (CTAB) for the detection of hydrogen peroxide in acidic and neutral media. Prussian blue was synthesized and characterized by Fourier transform infrared spectroscopy (FT-IR), Ultraviolet-visible spectroscopy (UV-vis), Thermogravimetric analysis (TGA) and Energy dispersive spectroscopy (EDS). The electrochemical behavior of the GC, GC-PB, GC-CTAB and GC-CTAB-PB electrodes were studied by cyclic and square wave voltammetry in acidic and neutral media for the detection of hydrogen peroxide. The result indicates that the modification of the glass carbon (GC) electrode with Prussian blue and cetyltrimethylammonium bromide, a cationic surfactant, promotes cathodic and anodic redox reactions. The cathodic current observed is due to a one electron reduction of Prussian blue.