Zur stromausbeute und kinetik elektrochemischer reaktionen bei hohen stromdichten unter stationären bedingungen

The investigation of the kinetics of electrochemical reactions at high current densities (20?300 A cm^?2) and high streaming velocities of the electrolyte, is difficult. Large ohmic drops occur which make the exact measurement of potential impossible. A method is reported for multiple electrodes in which the kinetic parameters are deduced, without measuring current-voltage curves, from the dependence of the current efficiency on total current density. The basis of the theory is discussed for a model system of two parallel Tafel type reactions. The anodic dissolution of iron with simultaneous oxygen evolution in KNO₃ and NaClO₃ solutions has been investigated experimentally.