SFB-558, Metal-substrate interactions in the heterogeneous catalysis.
Within the scope of SFB-558, the B1 and T1 projects are dealing with novel startegies for the catalyst preparation. Here, in particular, metalorganic precursors for catalytically active metals (e.g. copper) and promoting metal-oxide components (zinc-oxide and aluminum-oxide) are applied. Loading of highly porous support materials occurs by impregnation with nonaquaeous solutions and by means of MOCVD or ALD processes. Homepage SFB-558 Homepage SFB-558
Transfer-project
MOALD-loading of mesoporous support materials.
S. Hermes, F. Schröder, E. C. Maile
The MOCVD/ALD loading of MCM-41/48 and related support-matrices with nanoscaled composits Cu/ZnO/Al2O3 is optimised. Copper-alkoxides, -betadiketonates etc. are combined with zinkalkyls and aluminiumalkyls or hydrides. A permutation of loaded steps is examinated. Our aim are novel catalyst prototypes for industrial test-equipment by our partner Süd-Chemie.
Publication: MOCVD-loading of mesoporous siliceous matrices with Cu/ZnO: Supported catalysts for methanol synthesis, R. Becker, H. Parala, F. Hipler, O. P. Tkachenko, K. Klementiev, W. Grunert, H. Wilmer, O. Hinrichsen, M. Muhler, A. Birkner, C. Woell, S. Schafer, R. A. Fischer, Angew. Chem. Int. Ed. Engl. 2004, 43, 2839-2842.
Project B1, Colloidal Metal/Metaloxid-Nanoparticle
Colloidal Metal/Metaloxid-Nanoparticle
M.-K. Schröter, T. Hikov, M. Cokoja
Nanoparticles (1-10 nm), as colloids stabilized in nonaqueous solution are interesting due to their high surface/volume ratio. Our goal is to maximize the surface contact between the catalytycally active metal (e.g. Cu, Au) and the promoting support (metaloxide e.g. ZnO, TiO2) by a colloidal approach.
Publications: Redox Chemistry of Cu Colloids Probed by Adsorbed CO: An in Situ Attenuated Total Reflection Fourier Transform Infrared Study, M. K. Schroeter, L. Khodeir, J. Hambrock, E. Loeffler, M. Muhler, R. A. Fischer, Langmuir 2004, 20, 9453-9455. - Nano-Brass: Bimetallic Copper / Zinc Colloids by a Nonaqueous Organometallic Route Using [Cu(OCH(Me)CH2NMe)2] and Et2Zn as Precursors, J. Hambrock, M. K. Schroeter, A. Birkner, C. Woell, R. A. Fischer, Chem. Mater. 2003, 15, 4217-4222.