Electrooxidation of Glycerin by Potential Sweep Technique and Controlled Potential Electrolysis

摘要

In this study, potential sweep technique and controlled potential electrolysis were used to analyze theelectrochemical oxidation of glycerin in a three electrode system using platinum as a workingelectrode. Electrochemical experiments were performed at different concentrations of glycerin andmanganese dioxide (0.015-0.124 M) to analyze the reaction order of reactant and oxidant.Voltammograms were studied at different positive and negative potential limits (-1.5 to 1.5 V vsAg/AgCl), sweep rates (0.01 to 0.08 V/s) and temperatures (27 to 60 C). The influence of eachparameter on the voltammogram shape is discussed. Prolonged electrolysis at controlled potential yieldglyceraldehyde, glyceric acid and glycolid acid as the main products.