1. School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
2. Nanotechnology Engineering, Faculty of Advanced Technology and Multidisciplinary, Airlangga University, Jl. Dr. Ir. H. Soekarno, Surabaya 60115, Indonesia
3. Centre of Hydrogen Energy, Institute of Future Energy, 81310 UTM Johor Bahru, Johor, Malaysia