1. Department of Energy Engineering School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
2. Emergent Hydrogen Technology R&D Center Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
3. Center for Wave Energy Materials Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea