1. Department of Chemistry, Graduate School of Science & Research Center for Materials Science (RCMS), Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
2. RIKEN SPring-8 Center, Koto, Sayo, Hyogo 679-5148, Japan
3. Innovation Research Center for Fuel Cells, The University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
4. Japan Synchrotron Radiation Center, SPring-8, Koto, Sayo, Hyogo 679-5198, Japan
5. Japan Advanced Institute of Science and Technology, Asahidai, Nomi, Ishikawa 923-1292, Japan