Electrochemical behavior of β-MnO2 and MnOOH nanorods in different electrolytes

A manganese dioxide (beta-MnO2) and MnOOH nanoparticles has been synthesized by hydrothermal method. As prepared samples are analyzed by X-ray Diffraction (XRD) and Field Emission Scanning Electron Microscopy (FESEM). FESEM showed rod morphology within the diameter of 50-200 and length of few nanometers. These nanorods are immobilized on a Glassy Carbon Electrode (GCE) by drop cast method. The comparative electrochemical behavior of beta-MnO2 and MnOOH rod modified GCE electrodes are analyzed by cyclic Voltammetry (CV) method in different electrolytes of 0.1M KCl, 0.1M Na2SO4, 0.1M NaOH, 0.1M PBS, 0.1M H2SO4. From the cyclic Voltammetry analysis found that in all the electrolytes both beta-MnO2 and MnOOH modified GCE electrodes exhibit electrochemical behavior and KCl shows well redox properties as compared with others. There is also an observable difference in reduction potential value of both crystalline nanostructurers and concluded that beta-MnO2 has high catalytic ability as compared with MnOOH rods.