1. Institute of Physical Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, Giessen 35392, Germany
2. Center for Materials Research, Justus Liebig University, Heinrich-Buff-Ring 16, Giessen 35392, Germany
3. Deutsches Elektronensynchrotron (DESY), Notkestr. 85, Hamburg 22607, Germany
4. Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich GmbH, Egerlandstr. 3, Erlangen 91058, Germany
5. Synchrotron Radiation Research, Lund University, Lund 22100, Sweden
6. Department of Chemistry, Nano-Science Center, University of Copenhagen, Universitetsparken 5, Copenhagen 2100, Denmark
7. Fachbereich Physik, University Hamburg, Hamburg 20355, Germany