METAL-BORIDE, METAL-NANOPARTICLES CONTAINED WITH STRITTED METAL-BORIDE AND BORUS FOR WATER-DISSIPATION AND OXYGEN-REDUCTION

摘要

The invention relates to metal borides and nitrogen-doped borides of metal (such as cobalt, iron and nickel as metals) with a high surface area and traces of boron-containing metal nanoparticles (such as iridium and ruthenium nanoparticles) with a large surface, their preparation by chemical reduction of the corresponding Sodium borohydride metal salts in an aqueous solution under oxygen-free conditions, catalysts containing such metal borides, nitrogen-doped metal borides or boron-containing metal nanoparticles, and the use of metal borides, nitrogen-doped metal borides, boron-containing metal nanoparticles, and catalysts for catalysing water oxidation under oxygen evolution and in the case of the nitrogen-doped metal borides also for the oxygen reduction and hydrogen evolution.