Abstract: The invention relates to an Au/Fe2O3 catalyst comprised of a particle-shaped, co-catalytically active Fe2O3 supporting material with metallic Au clusters deposited thereupon which have a diameter of less than 4.5 nm. The catalyst materials can be obtained by: a) reacting a water-soluble Fe(III) salt in an aqueous medium with a base; b) impregnating the hydroxide gel which is formed thereby and which is still moist with a solution of a water-soluble Au compound in order to deposit complexed Au clusters on the surface of the hydroxide gel; c) removing water from the suspension of the reaction product formed thereby; d) subjecting the dried reaction product to a calcination at temperatures ranging from 350 and 700° C. The inventive catalyst material is especially suited for selective low-temperature CO oxidation in reformate hydrogen which is used as combustible gas for polymer electrolyte membrane (PEM) fuel cells.

Abstract: The invention relates to a double layer cathode for molten carbonate fuel cells, containing a first layer (2a) consisting of a first cathode material, preferably lithium-treated nickel oxide, and a second layer (2b) consisting of cerium-activated lithium cobaltite. The inventive double layer cathode is characterised in that the polarization resistance is less dependent on temperature and in that it has a longer life. The double layer cathode is especially suitable for operating a fuel cell at less than 650° C. The material for the second cathode layer (2b) is produced by activating cobalt oxide by co-precipitation with cerium and treating it with lithium carbonate to form a suspension. Said suspension is then applied to the first cathode layer (2a) as a second cathode (2b), dried and sintered at a high temperature.