Polarization phenomena at the interfaces between an electrolyte solution and an ion exchange membrane: Part I. Ion transfer with a cation exchange membrane

Abstract Polarization phenomena occurring with ion exchange membranes have been investigated for the Selemion AMV anion exchange membrane in contact with NACl solutions. Recording of the current density—voltage responses combined with pH measurements and with individual ion flux measurements allow the determination of which phenomena are at the basis of the current transport. The concentration and potential profiles within the depleted unstirred layer have been calculated. Water splitting is indicated beyond the limiting current density. Analysis of the different overvoltages leads to a comparison between the interfacial transfer overvoltages of both the AMV anion exchange membrane and the CMV cation exchange membrane.

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