1. Department of Chemistry; Chemical Engineering Division; Technical University of Berlin; 10623 Berlin Germany
2. European Synchrotron Radiation Facility (ESRF); 38000 Grenoble France
3. School of Engineering & Applied Science; Washington University in St. Louis; 63130 St. Louis MO USA
4. Department of Heterogeneous Reactions; Max-Planck-Institute for Chemical Energy Conversion; 45470 Mühlheim an der Ruh 14195 Berlin Germany
5. Department of Inorganic Chemistry; Fritz-Haber-Institut der Max-Planck-Gesellschaft; Berlin Germany
6. Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK-11); Forschungszentrum Jülich 91058 Erlangen Germany
7. Ernst-Ruska Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute; Forschungszentrum Jülich 52425 Jülich Germany