1. Institute of Molecular Science, Key Lab Mat Energy Convers and Storage Shanxi Province, Shanxi University Taiyuan 030006 China
2. State Key Laboratory of Materials‐Oriented Chemical Engineering, College of Chemistry and Chemical EngineeringNanjing University of Technology No. 5 Xin Mofan Road Nanjing 210009 China
3. Analytical Instrumentation centerInstitute of Coal Chemistry, Chinese Academy of Sciences 27 South Taoyuan Road Taiyuan 030001 China
4. State Key Laboratory of Coal and CBG Co‐ming, Shanxi Lanyan Coalbed Methane, Group Co. Ltd Jincheng 048204 China