Affiliation: | 1. Graduate School of Environmental Studies, Tohoku University, 6-6 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan;2. Hydrogen System Team, Technology Research Institute, Fundamental Technology Department, Technology Development Division, Tokyo Gas Co., Ltd., 1-7-7 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan |