1. Center for Advanced Research of Energy Conversion Materials, Hokkaido University, North 13 West 8, Kita-ku, Sapporo,
060-8628, Japan
2. Department
of Manufacturing and Materials Engineering, Faculty of Engineering, International Islamic University, 50728 Kuala Lumpur,
Malaysia
3. Department of Chemical
Engineering, Gadjah Mada University, JI.
Grafika 2, Bulaksumur, Yogyakarta 55281, Indonesia
4. Energy Technology Research Institute, Advanced Industrial Science and Technology (AIST),
AIST Tsukuba West 16-1, Onogawa, Tsukuba, Ibaraki, 305-8569, Japan