This work was financially supported by the National Natural Science Foundation of China (Nos. 21222305, 21373208, and 21033009), Ministry of Science and Technology of China (Nos. 2011CB932704 and 2013CB834603), and the Key Research Program of the Chinese Academy of Sciences. The ALS and the MES beamline 11.0.2 are supported by the Director, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences and Materials Sciences Division of the US Department of Energy at the Lawrence Berkeley National Laboratory under Contract No. DE-AC02-05CH11231.
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