1. Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; 21 Nanyang Link Singapore 637371 Singapore
2. Energy Research Institute@NTU; Nanyang Technological University; Research Techno Plaza Singapore 637553 Singapore
3. RIKEN CLST-JEOL Collaboration Center, Yokohama, Kanagawa 230-0045 (Japan)
4. JEOL RESONANCE Inc. Akishima; Tokyo 196-8558 Japan
5. Solar Fuels Laboratory; Nanyang Technological University; 50 Nanyang Avenue Singapore 637553 Singapore
6. Singapore-Berkeley Research Initiative for Sustainable Energy (SinBeRISE); 1 Create Way Singapore 138602 Singapore