1. Department of Chemistry, Chemical Engineering and Life Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
2. Department of Electrotechnics, School of Power Engineering, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia
3. Faculty of Engineering, New Mongol Institute of Technology, Ulaanbaatar 13372, Mongolia