TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preparation: No preparation method is given. Preferred Components: The noble metal or noble metal oxide comprises ruthenium, iridium, platinum, palladium and their oxides, preferably one or more of ruthenium and iridium or ruthenium oxide and iridium oxide. An average particle diameter of the particles of the non-noble metal oxide powder is less than 1 mu m, preferably 10-600 nm. The non-noble metal oxide of the non-noble metal oxide powder comprises one or more oxides and/or mixed oxides, preferably titanium oxide, tin oxide, niobium oxide, tantalum oxide, vanadium oxide, germanium oxide, tellurium oxide, lead oxide, manganese oxide, iron-antimony oxide or molybdenum oxide. The non-noble metal oxide of the non-noble metal oxide powder comprises titanium oxide and tin oxide. The catalyst further comprises a doped non-noble metal oxide, preferably a compound comprising antimony-doped tin oxide, indium tin oxide, fluorine-doped tin oxide, aluminum-doped zinc oxide, and indium-doped zinc oxide. The non-noble metal oxide powder includes both particles with spherical symmetry and fibrous particles having an average length (major dimension of the fiber) of up to 100 mu m, preferably up to 20 mu m. A specific surface area of the non-noble metal oxide powder (as determined by nitrogen adsorption according to the multi-point Brunauer-Emmett-Teller method at -196 degrees C (according to DIN ISO 9277)) of 0.5-500 m2/g, preferably 2-150 m2/g. The non-noble metal oxide of non-noble metal oxide powder is doped with one or more doping elements comprising antimony, niobium, tantalum, iridium, and fluorine, whose proportion is 0.0001-0.1 mole of the doping elements per mole of the sum of the other metals contained in the non-noble metal oxide. The catalyst comprises: 1-90 mole%, preferably 20-70 mole% of finely divided non-precious metal oxide powder; 0.05-40 mole%, preferably 5-30 mole% of noble metal and/or noble metal oxide; 0-90 mole%, preferably 10-75 mole% of valve metal and/or valve metal oxide; and 0-90 mole%, preferably 0.1-20 mole% of a doped non-noble metal-oxide. The electrically conductive support is made of the valve metal comprising titanium, zirconium, tungsten, tantalum and niobium, preferably titanium or its titanium alloy. A loading of the electrode is 0.1-30 g of noble metal/m2 and 0.1-75 g of finely divided non-noble metal oxide/m2. EXAMPLE - No suitable example given.