1. Chemical and Process Engineering; Technische Universität Berlin; Fraunhoferstr. 33-36 10587 Berlin Germany
2. Institute of Chemical Reaction Engineering; Hamburg University of Technology; Eißendorfer Str. 38 21073 Hamburg Germany
3. Dept. of Inorganic Chemistry; Fritz Haber Institute of the Max Planck Society; Faradayweg 4-6 14195 Berlin Germany
4. Inorganic Chemistry, University of Duisburg-Essen; Universitätsstr. 7 45141 Essen Germany