1. SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
2. SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
3. Department of Physics, Technical University of Denmark, Fysikvej, Building 312, Dk-2800 Kongens Lyngby, Denmark
4. Energy Technologies Area, Lawrence Berkeley National Laboratories, 1 Cyclotron Road, MS 0700108, Berkeley, California 94720, United States