Catalytic Active SiC Nanocomposites based on Molecular Precursor Synthesis, Characterisation and Catalytic Tests



Dr. Mathias Herrmann
Fraunhofer Institute for
Ceramic Technologies &
Systems (IKTS)
Dresden


Prof. Dr. Stefan Kaskel
Technische Universität Dresden
Institute of Inorganic Chemistry
Dresden


The 6-year project aims to create porous SiC materials from molecular precursors which can be used as a catalytic coating of ceramic carriers for combustion processes. In the first project phase functionalised precursors were generated by means of molecular nanotools and were converted to highly porous nanocomposites and films. The catalytic efficiency of the produced precursors with ceroxide as an active centre was revealed, proving the feasibility of the concepts presented in the 1st project phase. By controlling the size and distribution of the functional centres, the aim is to improve the activity of the catalysts. This will be achieved by the molecular design of the precursors, control of pore formation and further elaboration of the processes taking place during pyrolysis. Research focus will be particularly on the use of material in the catalytic combustion of soot as well as methane combustion. This approach should lead to solving fundamental questions related to catalytic applications, such as the regeneration of diesel soot filters. In order to analyse the structure of functionalised precursors and ceramic pyrolysis products and their catalytic efficiency, materials will be characterised by using methods such as microscopy, thermal desorption, physisorption and test reactions. Hence, the interrelation between material structure, process parameters and solid-state properties will be recognised and used specifically.