1. Department of Physics, AlbaNova University Center, Stockholm University, SE-10691, Sweden.
2. SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
3. SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, CA 95305, USA.
4. Helmholtz Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany.
5. Physics Department and Center for Free Electron Laser Science, University of Hamburg, Luruper Chausse 149, D-22761 Hamburg, Germany.
6. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
7. Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
8. Fakultät für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany.
9. Fritz-Haber Institute of the Max-Planck-Society, Faradayweg 4-6, D-14195 Berlin, Germany.
10. Deutsches Elektronen-Synchrotron, Photon Science, Notkestrasse 85, D-22607 Hamburg, Germany.
11. Surface Science Research Centre and Department of Chemistry, The University of Liverpool, Liverpool, L69 3BX, UK.