TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The coating solution or the coating dispersion comprises at least one acid having a pKa value in aqueous solution of not greater than 12. The coating solution or the coating dispersion additionally comprises at least one precursor compound, a metal and/or a metal oxide of at least one doping element comprising aluminum, antimony, lead, iron, germanium, indium, manganese, molybdenum, niobium, tantalum, titanium, tellurium, vanadium, zinc, tin or zirconium. The precursor compound used in the step (a) comprises a chloride of ruthenium and/or iridium and optionally titanium alkoxide, preferably titanium butoxide or titanium propoxide. The acid used in the coating solution in the step (a) comprises an organic- and/or inorganic acid, preferably a combination of organic- and inorganic acid, where the molar ratio of organic acid present in the coating solution or the coating dispersion and mineral acid is 20:80-100:0. The acid used in the coating solution in the step (a) is hydrochloric acid and/or a 1-4C carboxylic acid comprising formic acid, acetic acid or propionic acid. The carrier is based on a valve metal comprising titanium, zirconium, tungsten, tantalum or niobium, preferably titanium (preferred) or niobium, preferably titanium or a titanium alloy, or tantalum. The coating solution or the coating dispersion additionally comprises at least one precursor compound comprising aluminum, antimony, lead, iron, germanium, indium, manganese, molybdenum, niobium, tantalum, titanium, tellurium, vanadium, zinc, tin, and/or zirconium, preferably tin, indium, manganese or antimony or optionally precursor compound for a doping, where the proportion of the doping elements is preferably up to 20 mole%, based on the total content of metals in the coating solution or dispersion. The coating solution or the coating dispersion in the step (a) comprises at least one precursor compound comprising aluminum, antimony, tantalum, niobium, tin or indium, preferably tin(IV) chloride, indium(III) chloride, antimony(III) chloride or manganese(II) chloride. The additional valve metal precursor compound comprises solvent-soluble fluorides, chlorides, iodides, bromides, nitrates, phosphates, sulfates, acetates, acetylacetonates or alkoxides of titanium, zirconium, tungsten, tantalum or niobium, preferably at least one titanium alkoxide comprising titanium-2-ethylhexyl-oxide, titanium ethoxide, titanium isobutoxide, titanium isopropoxide, titanium methoxide, titanium n-butoxide, titanium n-propoxide, titanium tert-butoxide, preferably titanium n-butoxide and/or titanium isopropoxide. The catalyst coating with binary mixed oxides is produced from titanium oxide and ruthenium oxide using a coating solution comprising titanium(IV) butoxide or ruthenium(III) chloride and a mixture of acetic acid and water. Preferred Method: The thermal treatment in the step (d) and the drying in the step (c) are carried out in presence of air or a mixture of oxygen and a protective gas comprising nitrogen or an inert gas, preferably helium, neon, argon or krypton. The surface of the carrier before applying the coating solution or the coating dispersion on the carrier in the step (b), is mechanically pre-cleaned, preferably sandblasted and optionally etched with an acid e.g. hydrochloric acid or oxalic acid for further removal of oxides on the surface.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The solvent or dispersant is water or 1-6C alcohol, preferably butanol or isopropanol. EXAMPLE - No suitable example given.