1. Mitsubishi Chemical Corporation, Science & Innovation Center, 1000 Kamoshida-cho, Aoba-ku, Yokohama-shi, Kanagawa 227-8502, Japan
2. Japan Technological Research Association of Artificial Photosynthetic Chemical Process (ARPChem), Tokyo, Japan
3. Research Initiative for Supra-Materials, Shinshu University, 4-17-1 Wakasato, Nagano-shi, Nagano 380-8553, Japan
4. Research Institute for Material and Chemical Measurement, National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
5. Global Zero Emission Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba 16-1 Onogawa, Ibaraki 305-8569, Japan
6. Office of University Professors, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan