A COMPARATIVE STUDY ON THE PREPARATION OF GLASSY CARBON ELECTRODES MODIFIED WITH ELECTROCHEMICALLY REDUCED GRAPHENE OXIDE

This work introduces a novel comparative analysis on the morphology, surface chemistry and electrochemical behavior of electrochemically reduced graphene oxide (ERGO) modified electrodes obtained by two commonly used methods: direct electrodeposition, and electrochemical reduction of GO drop-casted films. We report that electrodes modified through drop -casting are uniformly coated with ERGO layers, unlike electrodes obtained through electrodeposition, which only show isolated ERGO agglomerates on their surface. However, cyclic voltammetry investigations in the presence of soluble redox probes indicate that drop -casting is less reproducible for producing ERGO -modified electrodes, evidenced by 17 -fold increase in the relative standard deviation of the estimated surface area.