Sodium percarbonate (SPC) can be produced electrochemically from aqueous solution in both its and forms simultaneously. This was achieved in a two-compartment cell separated by a cation-exchange membrane. was produced on the anodic side by water oxidation on a boron-doped diamond electrode, with anodic current efficiencies of 20–40%. On the cathodic side, SPC was synthesized from carbonate through generation of by oxygen reduction on high-surface-area carbon felt. Cathodic current efficiency was 60% and nearly constant. The effect of as a percarbonate stabilizer was studied during electrolysis and during storage, with giving the best performance.

Herein we report the synthesis of efficient Co₃O₄ electrocatalysts toward the oxygen evolution reaction (OER) in alkaline media. Co₃O₄ films were obtained by thermal treatment of Co electrodeposited from electrolytic solutions containing glycine at different pH values. Co₃O₄ films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The grain size of the electrocatalysts decreases to 100 nm and the oxygen vacancies content increases, as the pH of the solution was increased during the synthesis. Linear Sweep voltammetry (LSV) and Chronopotentiometry techniques were employed to evaluate the electrocatalytic activity of the films. Co₃O₄ electrocatalysts obtained at pH values higher than 7 exhibit a better electrocatalytic performance than the obtained at pH values less than 4, such as a potential to reach 1.5 mAcm⁻² of 0.6 V and 0.68 mV, respectively. Co₃O₄ synthesized under alkaline conditions exhibit the best charge transfer resistance with 4.3 Ω during OER electrolysis. The improvement is associated to the presence of oxygen vacancies that promote the activity and stability of the electrocatalysts toward the OER.