1. IVG, Institute for Combustion and Gas Dynamics -Reactive Fluids and CENIDE, Center for NanointegrationUniversity of Duisburg-Essen Carl-Benz-Str. 199 47057 Duisburg Germany
2. Laboratory of Industrial ChemistryFaculty of Chemistry and BiochemistryRuhr University Bochum Universitätsstr. 150 44801 Bochum Germany
3. Analytical ChemistryCenter of Electrochemical Sciences (CES)Faculty of Chemistry and BiochemistryRuhr University Bochum Universitätsstr. 150 44801 Bochum Germany
4. Chemical Technology IIIFaculty of Chemistry and CENIDE Center for Nanointegration University of Duisburg-Essen Carl-Benz-Str. 199 47057 Duisburg Germany