TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The first solution containing a platinum precursor is basic and contains potassium carbonate, sodium carbonate, potassium hydroxide, or sodium hydroxide. The platinum precursor is platinic acid. The second solution is acidic and the ruthenium precursor is ruthenium chloride. The second solution further contains an acid. The second solution containing a ruthenium precursor is a basic solution containing ruthenium oxide ions, and the first solution is an acidic solution of platinic acid. The two solutions contain a suspended carbon powder which is a conductive carbon black. The reducing agent is borohydride or phosphite.Preferred Process: The basic solution containing ruthenium oxide ions is obtained by reacting ruthenium chloride and hypochlorite ion in a sodium hydroxide solution.    TECHNOLOGY FOCUS - METALLURGY - Preferred Process: The precipitated platinum and ruthenium hydrous oxides and/or hydroxides are subsequently reduced by the addition of a reducing agent to the final solution. The precipitated platinum and ruthenium hydrous oxides and/or hydroxides are reduced in a gas stream containing hydrogen at elevated temperature after filtering and drying.Preferred Concentration: The atomic ratio of platinum:ruthenium is higher than 1, optionally greater than or equal to 2.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The first solution containing a platinum precursor is basic and contains potassium carbonate, sodium carbonate, potassium hydroxide, or sodium hydroxide. The platinum precursor is platinic acid. The second solution is acidic and the ruthenium precursor is ruthenium chloride. The second solution further contains an acid. The second solution containing a ruthenium precursor is a basic solution containing ruthenium oxide ions, and the first solution is an acidic solution of platinic acid. The two solutions contain a suspended carbon powder which is a conductive carbon black. The reducing agent is borohydride or phosphite.Preferred Process: The basic solution containing ruthenium oxide ions is obtained by reacting ruthenium chloride and hypochlorite ion in a sodium hydroxide solution.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The reducing agent is formaldehyde, or formic acid. The acid is acetic acid.