CATALYST SUPPORT AND METHOD FOR PRODUCING POROUS GRAPHITIZED CARBON MATERIAL COVERED WITH METAL NANOPARTICLES

摘要

In a known process for the production of porous graphitized carbon materials coated with metal nanoparticles for electrochemical applications, the porous template framework made of an inorganic mold material is impregnated with a carbon precursor. After the heat treatment of the carbon precursor, the template framework is removed. Then, the obtained particulate porous carbon material is coated with a catalytically active material. In accordance with the present invention, in order to maintain a low level of noble metal loading required for commercial products on the basis of the known method, the thermal treatment of the carbon precursor first includes carbonization and, until the template framework is removed, The porous carbon material is not graphitized into a graphitized particulate porous carbon material. The graphitized carbon material has a hierarchical pore structure with a pore volume of at least 0.5 cm3 / g, wherein at least 75% of the pore volume is distributed in macropores having a size range of 100 to 5000 nm. Before coating with the catalytically active material, the carbon material is activated in an oxidizing atmosphere.