1. Fuel Cell Research Center
2. Korea Institute of Science and Technology
3. Seoul 02792
4. Republic of Korea
5. Green School
6. Department of Environmental Engineering
7. Chungbuk National University
8. Cheongju
9. School of Chemical and Biological Engineering
10. Faculty of Chemistry and Mineralogy
11. University of Leipzig
12. 04109 Leipzig
13. Germany
14. Seoul National University
15. Seoul 08826
16. Advanced Analysis Center
17. Korea Institute of Science and Technology (KIST)
18. Korea University
19. Seoul 02841