Interaction of Oxidized Multiwalled Carbon Nanotubes with Coronene on Graphite Electrodes: Electrochemical Examination

The possibilities of activation of carbon electrodes by oxidized multiwalled carbon nanotubes and hybrid nanomaterials based on carbon nanotubes and coronene, which can be considered as an elementary fragment of graphene, were studied. The electrochemical properties of the modified electrodes by the example of graphite slate electrodes and carbon electrodes obtained by screen printing were studied by the method of cyclic voltammetry. It is shown that the modification of the electrode surface with carbon nanotubes significantly increases the efficiency of electrochemical processes in both systems, which indicates the prospects for the use of pencil graphite in electroanalysis and for the creation of bioelectrodes. However, contrary to expectations, the adsorption of coronene on oxidized multiwalled carbon nanotubes reduces the observed effect. A scheme of the proposed interaction between nanotubes and coronene is presented in order to explain the obtained results. Simulation of the processes of electrocatalytic oxidation-reduction of methylene blue on modified electrodes confirms the proposed scheme for the interaction of oxidized carbon nanotubes and c-oronene.