1Division of Physical Science and Engineering and KAUST Catalysis Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
2Department of Chemistry, Tsinghua University, Beijing 100084, China
3SUNCAT Center for Surface Sciences and Catalysis, Stanford University, Stanford, California 94305, United States
4Department of Physics, Khalifa University, Abu Dhabi 127788, United Arab Emirates
5Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR, 999077 China