an electrode comprising a current - conducting base having deposited thereon an active mass of the following composition , in percent by mass : ______________________________________ silica 10 - 90platinum group metal oxides 5 - 45oxides of passivating metals 5 - 45 . ______________________________________ the electrode of this invention is useful as anodes in the production of chlorine and caustic soda , as well as in electrolytic processes of producing chlorates and hyperchlorites .