1. Clean Energy Research Center, National Agenda Research Division, Korea Institute of Science and Technology (KIST), Hwarangno
14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
2. Clean Energy and Chemical Engineering, University of Science and Technology, 113 Gwahangno,
Yuseong-gu 305333, Daejeon, Korea
3. Green School, Korea University, 5-1 Anam
Dong, Seongbuk-gu, Seoul 136-701, Republic of Korea