1. Department of Mechanical Engineering
2. Faculty of Engineering
3. Kyushu University
4. Fukuoka 819-0395
5. Japan
6. International Research Center for Hydrogen Energy
7. WPI International Institute for Carbon-Neutral Energy Research (WPI-I2CNER)
8. Institute of Condensed Matter and Nanosciences
9. Université catholique de Louvain
10. Louvain-la-Neuve 1348
11. Belgium