1. Materials Sciences Division; Lawrence Berkeley National Laboratory; 1 Cyclotron Road Berkeley CA 94720 USA
2. Joint Center for Artificial Photosynthesis; Lawrence Berkeley National Laboratory; 1 Cyclotron Road Berkeley CA 94720 USA
3. Chemical Sciences Division; Lawrence Berkeley National Laboratory; 1 Cyclotron Road Berkeley CA 94720 USA
4. Stanford Synchrotron Radiation Lightsource; SLAC National Accelerator Laboratory; 2575 Sand Hill Road Menlo Park CA 94025 USA
5. Department of Energy; Environmental and Chemical Engineering; Washington University in St. Louis; Brauer Hall, CB 1180, 1 Brookings Drive Saint Louis MO 63130 USA