1. Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea
2. Department of Energy Science, Sungkyunkwan University, 2066 Seobu-ro,
Jangsan-gu, Suwon 440-746, Republic of Korea
3. School of Civil, Environmental and Architectural Engineering, Korea University, Seoul 136-713, Republic of Korea
4. School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Eonyang-eup,
Ulju-gun, Ulsan 44919, Republic of Korea