1. Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208, USA
2. SmartState™ Center for Economic Excellence in the Strategic Approaches to the Generation of Electricity, Columbia, South Carolina 29208, USA
3. Joint Center for Artificial Photosynthesis, California Institute of Technology, Pasadena, California 91125, USA
4. Materials Measurement Science Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
5. Materials Science and Engineering Department, University of Maryland, College Park, Maryland 20742, USA