1. Department of Applied Chemistry Faculty of Science and Engineering Waseda University 3-4-1 Okubo Shinjuku-ku Tokyo 169-8555 Japan
2. Waseda Institute for Advanced Study Waseda University 1–6-1 Nishiwaseda Shinjuku-ku, Tokyo 169-8050 Japan
3. Current address: Green Hydrogen Research Center Yokohama National University 79-5 Tokiwadai, Hodogaya-ku Yokohama 240–8501 Japan
4. Kagami Memorial Research Institute for Materials Science and Technology Waseda University 2-8-26 Nishiwaseda Shinjuku-ku Tokyo 169-0051 Japan