1. School of Chemical Sciences The University of Auckland Auckland 1142 New Zealand
2. Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201204 P. R. China
3. Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
4. Chongqing Key Laboratory of Chemical Process for Clean Energy and Resource Utilization School of Chemistry and Chemical Engineering Chongqing University Chongqing 400030 P. R. China