1. Department of Chemistry, Colorado School of Mines, 1500 Illinois St., Golden, Colorado 80401, United States
2. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 2575 Sand Hill Rd., Menlo Park, California 94025, United States
3. Chemical and Materials Science Center, National Renewable Energy Laboratory, 15013 Denver West Pkwy., Golden, Colorado 80401, United States