Effect of MgB2-MWCNT Modified Glassy Carbon Electrode on Voltammetric Measurements of Dopamine

摘要

Th e effect of glassy carbon electrode modified with magnesium boride-multiwalled carbon nanotube (MgB2-MWCNT) prepared via mechanical attachment method was studied on the redox reaction of dopamine using cyclic voltammetry and chronocoulometry technique. Cyclic voltammogram showed a 1.9 fold enhancement of the dopamine oxidation peak current at the surface of the modified electrode and the current was due to diffusion process. It was also observed that the sensitivity of the modified electrode is significantly dependent on electrolyte, pH and scan rate.