1. Graduate School
of Energy and Environment, Seoul National University of Science and Technology, Nowon-gu, Seoul 01811, Republic of Korea
2. Fuel Cell Research Center, Korea Institute of Science and Technology, Hwgrangno 14-gil 5, Seongbukgu, Seoul 02792, Republic of Korea
3. ET-GT Convergence, University of Science and Technology, Hwarangno 14-gil 5, Seongbukgu, Seoul 02792, Republic of Korea
4. Green School, Korea University, Seoul 136-713, Republic of Korea