METHOD FOR PRODUCING CATALYST LAYERS FOR FUEL CELLS

• Main Authors: Widenmeyer, Markus, Jenewein, Ken, Wegner, Marcus
• Format: Patent
• Language: English
• Published: 25.04.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to a method for producing a catalyst material (47) comprising catalytically active nanoparticles (47), in particular for electrodes (7, 8, 45) with catalyst layers (30) as catalysts for a fuel cell (2), having the steps of: providing (52) a first starting material comprising a first metal, providing (53) a second starting material comprising a second metal, mixing the first starting material and the second starting material in order to form a reactant material, and thermally treating (56) the reactant material so that catalytically active nanoparticles (47) are produced from the first starting material and the second starting material and the first and second metal are connected together in order to at least partly form an alloy of the first and second metal in the catalytically active nanoparticles (47) such that catalytically active nanoparticles (47) are produced as an intermediate material comprising the alloy of the first and second metal. The content of the second metal and/or the second starting material on the surface (48) of the catalytically active nanoparticles (47) is reduced in the intermediate material so that a product material is produced from the intermediate material as the catalyst material (47).