1. Hawai’i Natural Energy Institute, University of Hawai’i at Ma̅noa, 1680 East West Road, POST 109, Honolulu, Hawaii 96822, United States
2. Hawai’i Institute of Geophysics and Planetology, University of Hawai’i at Ma̅noa, 1680 East West Road, POST 109, Honolulu, Hawaii 96822, United States
3. Département de Chimie Physique, Université de Genève, 30, quai E. Ansermet, 1211 Geneva 4, Switzerland
4. National Renewable Energy Laboratory (NREL), Colorado, Colorado 80401, United States
5. Chemistry Department, Colorado School of Mines, 1012 14th Street, Golden, Colorado 80401, United States