Stainless steel/hydroxyl functionalized graphene electrode for electrochemical oxidation of methyl orange

Graphene and its related compounds are among the emerging materials to be studied for many applications, especially for the electrochemical process. We prepared a stainless steel/hydroxyl functionalized graphene (SS/G-OH) electrode by anodic electrodeposition method. The G-OH dispersion is realized with a voltage of 30 V for electrodeposition variation time 1, 3, and 5 min with 316L stainless steel as an anode and cathode. The obtained SS/G-OH electrode was characterized by XRD, SEM-EDX, and FTIR. The G-OH modified SS electrode shows higher electrocatalytic ability than that of the bare SS electrode. The best electrodeposition time is 3 min. The electrochemical degradation of 20 ppm methyl orange (MO) by using the SS/G-OH electrode with an applied current of 1.5 A showed a concentration reduction of >99 after 30 min of reaction. The GC data suggest that MO was mainly degraded to CO2 and H2O. This graphene-based electrode could be of choice for the electrochemical degradation of industrial dyes. © 2021 Trans Tech Publications Ltd, Switzerland.