1. Fuel Cell Research Center; Korea Institute of Science and Technology; 39-1 Hawolgok-dong, Sungbuk-gu Seoul 136-791 Republic of Korea
2. Green School, Korea University; 145 Anam-ro, Seongbuk-gu Seoul 136-791 Republic of Korea
3. Department of Clean Energy and Chemical Engineering; Korea University of Science and Technology; Republic of Korea
4. Youlchon chemical; 78 Beomjigi-ro, Danwon-gu, Ansan-si Gyeonggi-do 425-851 Republic of Korea