1. Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
2. SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
3. Faculty for Chemistry and Center for Computational Sciences and Simulation, University of Duisburg-Essen, Universitätsstraße 2, D-45141 Essen, Germany