Résumé
In addition to their utilization in membrane separation processes (electrodialysis, dialysis, electro-deionization, etc.), polymer ionic membranes are utilized as a separator in fuel cells (hydrogen, biological and direct methanol fuel cells, etc.) [1]. In the latter, the oxidation of methanol generates electrons that circulate in the external circuit to feed a load (electrical resistance) and the protons migrate through the membrane, and combined with oxygen at cathode to yield droplets of water [2]. In this work, the proton transfer through the membrane was studied with voltamperometry by plotting current-voltage curves. The effect of methanol during proton transfer has also been studied by giving the limiting currents. The transport of proton through the membrane, has been investigated in two media: aqueous solution and hydro-organic solution. Moreover, the stability of applied current through the Nafion membrane, was also studied by using the Hittorf cell for determining the transport numbers of metal ions.