1. Integrated Graduate School of Medicine, Engineering and Agricultural Science, University of Yamanashi, Kofu, Yamanashi 400-8510, Japan
2. Toray Research Center, Inc., Otsu 520-8567, Japan
3. Clean Energy Research Center, University of Yamanashi, Kofu, Yamanashi 400-8510, Japan
4. Fuel Cell Nanomaterials Center, University of Yamanashi, Kofu, Yamanashi 400-8510, Japan
5. Department of Applied Chemistry, and Research Institute for Science and Engineering, Waseda University, Tokyo 169-8555, Japan