[1] Nanyang Technol Univ, Div Chem & Biol Chem, Sch Phys & Math Sci, 21 Nanyang Link, Singapore 637371, Singapore
[2] Nanyang Technol Univ, Div Phys & Appl Phys, Sch Phys & Math Sci, 21 Nanyang Link, Singapore 637371, Singapore
[3] Nanyang Technol Univ, Solar Fuels Lab, 50 Nanyang Ave, Singapore 639798, Singapore