1. State
Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. China
2. State
Key Laboratory Breeding Base of Coal Science and Technology Co-founded
by Shanxi Province and the Ministry of Science and Technology, Taiyuan University of Technology, Taiyuan 030024, P. R. China
3. School
of Chemistry, Monash University, Clayton, Victoria 3800, Australia