Huilong Fei,a Juncai Dong,b Dongliang Chen,b Tiandou Hu,b Xidong Duan,a Imran Shakir,*cd Yu Huang*c and Xiangfeng Duan*e
a State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
b Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
c Sustainable Energy Technologies Centre, College of Engineering, King Saud University, Riyadh 11451, Saudi Arabia
d Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
e Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA