1. School of Materials
Science and Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798
2. Joint
Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
3. Department of Chemistry, University of Bath, Bath BA2 7AY, United Kingdom
4. Institute for Solar
Fuels, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Hahn-Meitner-Platz 1, Berlin 14109, Germany