1. College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, P. R. China
2. Hunan Provincial Key Laboratory of Chemical Power Sources, Central South University, Changsha, Hunan 410083, P. R. China
3. College of Energy and Chemical Engineering, Xinjiang Institute of Technology, Aksu Prefecture 843100, Xinjiang Uygur Autonomous Region, P. R. China