Fig. 4: Spectroscopic characterization for Fe-NTMPA2 anolytes.
From: Phosphonate-based iron complex for a cost-effective and long cycling aqueous iron redox flow battery
a Spectra from X-ray absorption near-edge spectroscopy (XANES) and (b) Attenuated Total Reflectance (ATR) spectra, for Fe-NTPMA2 anolytes obtained at different SOCs (0, 25, 50, 75, and 100%). The insert of (b) shows the linear fits for the intensities of 982 and 1004 cm−1 peaks vs. SOCs.
