Divided cells are often used in electrochemical syntheses in order to prevent undesired side reactions and reverse reactions. In order to avoid the resulting expensive designs and modes of operation, a counter electrode is employed which, through its very small current-carrying area, reduces the reaction rate of the undesired reactions to such an extent that the use of undivided cells is possible. The current-carrying surface is finely distributed on a non-conducting base area; its size in proportion to the total area can be varied within practically arbitrary limits. Electrolyte channels may be integrated in the electrodes, which facilitates use in electrolysis cells using to the filter press principle.
展开▼
