1. Catalysts for Energy, Energy Materials In-situ Laboratory (EMIL), Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, BESSY II, Albert-Einstein-Straße 15, 12489 Berlin, Germany
2. Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
3. Department of Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, Mülheim an der Ruhr 45470, Germany
4. ALBA Synchrotron Light Source, Cerdanyola del Vallés (Barcelona) 08290, Spain
5. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA