1. Center for Hydrogen and Fuel Cell Research
2. Korea Institute of Science and Technology (KIST)
3. Seoul 02792
4. Republic of Korea
5. Department of Environmental Engineering
6. Chungbuk National University
7. Cheongju
8. KHU-KIST Department of Converging Science and Technology
9. Kyung Hee University
10. Seoul 02447
11. Department of Chemistry