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Further, the last section of the Experimental Section was missing the institutions at which the experiments were carried out and should read:
[…] The Mn K-edge X-ray absorption fine structure (XAFS) spectra were collected in fluorescence mode at room temperature at the U7C beamline of National Synchrotron Radiation Laboratory (NSRL), China. The Mn L3-edge and O K-edge X-ray absorption near-edge structure (XANES) spectra were collected in a mode of sample drain current under a vacuum better than 5 × 10−5 Pa at the U19 beamline of NSRL.