1. Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, People’s Republic of China
2. School of Electronic Information and Electrical Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, People’s Republic of China
3. Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming 650106, People’s Republic of China
4. Sino-Platinum Metals Company, Ltd., Kunming 650106, People’s Republic of China