1. Electrochemical Reaction and Technology Laboratory School of Earth Sciences and Environmental Engineering Gwangju Institute of Science and Technology (GIST) Gwangju 61005 South Korea
2. International Future Research Center of Chemical Energy Storage and Conversion Processes GIST Gwangju 61005 South Korea
3. Ertl Center for Electrochemistry and Catalysis GIST Gwangju 61005 South Korea
4. Clean Fuel Research Laboratory Korea Institute of Energy Research (KIER) 152 Gajeong-ro, Yuseong-gu Daejeon 34129 South Korea