Electrochemical production of peroxocarbonate at room temperature using conductive diamond anodes.

This work describes a method for synthesizing sodium peroxocarbonate by electoxidation of carbonate on conductive-diamond thin film electrodes in a sodium carbonate solution at room temperature. The effect of several parameters including: electrolyte concentration, current intensity, addition of NaSiO as a stabilizing agent, and increments in temperature for sodium peroxocarbonate formation has been studied in an electrochemical H cell of two compartments separated by a cation-exchange membrane. The oxidant formation has been confirmed by cyclic voltammetry and in situ reduction during water electrolysis. The optimal experimental conditions are: the current density of 34.3 mA cm, an electrolyte concentration of 1 M, and the addition of 4 g/L of sodium metasilicate in the two compartments of the electrochemical cell. [ABSTRACT FROM AUTHOR]