1 Department of Chemistry, Tsinghua University, Beijing 100084, China
2 School of Physics, Nankai University, Tianjin 300071, China
3 KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
4 Department of Physics and Chemistry, Faculty of Science and Technology, University of Macau, Taipa, Macau SAR, China
5 School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
6 Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
7 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
§ Jian Zhang and Caiyan Zheng contributed equally to this work.