[en] The chlorine evolution reaction is one of the most significant areas of investigation in the field of electro catalysis due to its direct impact on electrochemical technology. The introduction of the dimensionally stable anode* (DSA) in the electrochemical chlor-alkali industry provided a technological advance [1, 21, overcoming many limitations such as the high electrode potential, sharp occurrence of passivation phenomena and rapid drop in activity associated with earlier electrodes. DSA's are usually binary mixture of oxides, with the general form (A-B)O/sub x//M, where M is the base metal, AO/sub x/ is the conducting oxide, BO/sub x/ is an inert oxide. Since their discovery by Beer et al, the electrochemical behaviour of DSA's has been studied intensively using standard electrochemical methods such as cyclic voltammetry, impedance and so on. (author)