Controlling oxygen functional species of graphene oxide for an electro-oxidation of L-ascorbic acid

We electrochemically reduce graphene oxide to control the oxygen functional species. The electrocatalytic activities toward L-ascorbic acid oxidation of as-received and electroreduced graphene oxides are compared by cyclic voltammetry and surface changes by XPS and XRD analysis. The observations represent that edge-like oxygen functional groups by optimal electrochemical reduction result in the higher electrocatalytic activity.

Research highlights
► Electrocatalysis of graphene oxide in Vitamin-C (L-AA) oxidation.
► Controlling of oxygen species onto graphene oxide.
► Clarification of the functionality of reactive graphene surface.