Among the apparatus approaches, one can find electrode separation variation [1, 3–5, 8], four-electrode sample cell [1, 9–11], high surface area electrodes [12] and high current density [1] methods.
Among the apparatus approaches, one can find electrodeseparation variation [1, 3–5, 8], four-electrode sample cell[1, 9–11], high surface area electrodes [12] and high currentdensity [1] methods.