Abstract
In this work, we studied the effect of dimethylsulfone concentrations on the rate of anodic oxygen evolution and cathodic hydrogen evolution on a platinum electrode in acidic and alkaline media. By the method of calculating the DFT electron density functional at the level of the B97-3c theory using the Orca 4.2.0 program, the dimethyl sulfone bond breaking energy on the surface of platinum will be preferable through C-S bonds, according to the ion-radical mechanism. It has been confirmed by NMR and Raman spectroscopy that the end products of the anodic oxidation of dimethylsulfone in an acidic medium are methanesulfonic acid and dimethyldisulfone, in an alkaline medium - only dimethyldisulfone; the end products of cathodic reduction of DMSO2 are dimethylpolysulfides. Based on the obtained experimental results, a scheme of the electrocatalytic behavior of dimethylsulfone on a platinum electrode is proposed.
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