1. Key Laboratory
of Carbon Materials,
Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan
030001, P. R. China
2. Graduate
University of Chinese
Academy of Sciences, Beijing 100049, P. R. China
3. ShanXi XinHua Chemical Co., Ltd.,
Taiyuan 030008, P. R. China
4. Energy and Sustainability Research
Division, Faculty of Engineering, University of Nottingham, University
Park, Nottingham NG7 2RD, United Kingdom