1. College of Chemistry and Molecular Engineering and College of Engineering, Peking University, Beijing 100871, China.
2. State Key Laboratory of Fine Chemicals, College of Chemistry, Dalian University of Technology, Dalian 116024, China.
3. School of Physical Sciences, CAS (Chinese Academy of Sciences) Key Laboratory of Vacuum Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
4. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
5. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Post Office Box 165, Taiyuan, Shanxi 030001, China.
6. Synfuels China, Beijing 100195, China.
7. Chemistry Division, Building 555, Brookhaven National Laboratory, Post Office Box 5000, Upton, NY 11973-5000, USA.
8. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
9. Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China.
10. Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA 18015-3195, USA.
11. Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.