1. Graduate
School of Energy Science, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
2. Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8510, Japan
3. Institute
of Advanced Energy, Kyoto University, Uji 611-0011, Japan
4. Sumitomo Electric Industries Ltd., 1-1-3 Shimaya, Konohana-ku, Osaka 554-0024, Japan