1. Department
of Agricultural and Biological Engineering, Mississippi State University, Mississippi State, Mississippi 39762, United States
2. Key
Laboratory of Coal Science and Technology of Ministry of Education
and Shanxi Province, Taiyuan University of Technology, Taiyuan, Shanxi 030024, People’s Republic of China
3. School
of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, People’s Republic of China
4. Beijing
National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190, People’s Republic of China
5. Department
of Chemical and Petroleum Engineering and Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
6. X-ray Science
Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States