1. School of Material Science and EngineeringNanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
2. The Cambridge Centre for Advanced Research and Education in Singapore 1 CREATE Way Singapore 138602 Singapore
3. Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of Science P.O. Box 603 Beijing 100190 China
4. Department of Applied PhysicsKey Laboratory of Micro‐Nano Measurement‐Manipulation and Physics (Ministry of Education)Beihang University Beijing 100191 China
5. Institute of Chemical and Engineering Sciences A*STAR 1 Pesek Road Singapore 627833 Singapore
6. Department of Chemical EngineeringUniversity of Cambridge Cambridge CB2 3RA UK
7. Solar Fuels Laboratory and Energy Research Institute Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
8. Energy Research Institute @ Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore