1. Energy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
2. Department of Chemical and Biomolecular Engineering, University of California Berkeley, Berkeley, California 94720, United States
3. Department of Chemistry and John J. McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
4. Shell International Exploration and Production Inc., 3333 Highway 6 South, Houston, Texas 77082, United States
5. Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States