1. Kyushu University, Interdisciplinary Graduate School of Engineering Science, 6-1, Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
2. Kindai University, Department of Energy and Materials, 3-4-1, Kowakae, Higashi-Osaka, Osaka 577-8502, Japan
3. Osaka Metropolitan University, Research Center for Artificial Photosynthesis, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan