1. Physik-Department ECS, Technische Universität München, James-Franck-Str. 1, Garching D-85748, Germany
2. Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
3. Quantum Simulations Group, Materials Science Division, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
4. Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
5. Catalysis Research Center TUM, Ernst-Otto-Fischer-Straße 1, Garching bei München 85748, Germany