ELECTRODE WITH OVERLAYER INCLUDING OXIDES OF PLATINUM GROUP, OF IRON GROUP, OF MANGANESE, AND OF BORON

An electrode for electrochemical processes comprises an electrically conductive base topped with a layer of an active composition composed of, in wt %: metal oxide from the platinum group...5-45; at least one metal oxide from the iron and manganese group...19-94.9; boron oxide...0.1-50. A method of fabricating the electrode for electrochemical processes involves the deposition of an active composition on an electrically conductive base. The procedure involves the application thereto of a solution made up of a boric compound, at least one metal compound from the iron and manganese group which decomposes at a temperature between 360 and 500.degree.C to form oxides thereof, and at least one metal compound from the platinum group which decomposes at a temperature between 360 and 500.degree.C to form oxides thereof, and thermal treatment of said base at a temperature of 360 to 500.degree.C. Another method of fabricating the electrode for electrochemical processes involves the deposition of an active composition on an electrically conductive base by the application thereto of a first solution of a metal compound from the platinum group which decomposes at a temperature between 360 and 500.degree.C to form oxides thereof; thermal treatment of said base at a temperature of 360 to 500.degree.C, application thereto of a second solution made up of a boric compound which decomposes at a temperature between 360 and 500.degree.C to form oxides thereof, and thermal treatment of said base at a temperature of 360 to 500.degree.C.