The XAS measurements were carried out at TLS 01C2, NSRRC, Taiwan. Each spectrum was measured after the calibration of Pt L3-edge by Pt foil (11.564 keV) and Ru K-edge by Ru foil (22.117 keV) to prevent the deviation of incident energy. All the spectra were collected in the total fluorescence yield mode. To further analyze the XAS data, each spectrum was processed by the Athena software to acquire the results of normalizations, background subtractions, and k 3 weighting Fourier transforms. The k 3 weighting wavelet transforms were performed by Matlab.