1. Joint Center for Artificial Photosynthesis, California Institute of Technology, Pasadena, California 91125 United States
2. Department of Applied Physics and Material Science, California Institute of Technology, Pasadena, California 91125, United States
3. State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
4. Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
5. Department of Chemistry, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
6. State Key Laboratory of Molecular Reaction Dynamics, Dynamic Research Center for Energy and Environmental Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China