fig2
Figure 2. (A) Schematic illustration of homogeneous FMN-Na catalysis in a ferrocyanide-polysulfide redox flow battery (Fe-S RFB) with KOH-free supporting electrolyte; (B and C) Ultraviolet-visible (UV-vis) spectra of diluted anolytes collected at different SOCs (B) without and (C) with 30.0 mM FMN-Na. (D) SOC-dependent normalized absorbance indices of sulfur species in the anolytes with and without 30.0 mM FMN-Na. FMN-Na: Flavin mononucleotide sodium salt; SOC: state of charge.
