1. School of Chemistry and Chemical Engineering
2. Shanxi University
3. Taiyuan 030006
4. China
5. Analytical Instrumentation Center
6. Institute of Coal Chemistry
7. Chinese Academy of Sciences
8. Taiyuan 030001
9. P. R. China
10. State Key Laboratory of Catalysis
11. Dalian Institute of Chemical Physics
12. Dalian 116023