Fig. 2: Intervention mechanism of Fe/Mn dual sites.
From: Insights into free radical and non-radical routes regulation for water cleanup
a Schematic illustration of radical and non-radical pathway regulation in PMS oxidation systems by tuning Fe/Mn ratio and calcination temperature in bimetallic single-atom catalysts. b Degradation of BPA in NC-FeMnx(TA800)/PMS systems (inset: Degradation kinetics in NC-FeMnx(TA800)/PMS systems; Conditions: [BPA]0 = 20 mg L−1, [PMS]0 = 0.24 g L−1, [Cat.] = 0.16 g L−1, pHini = 7, x = 0.1, 0.2, 0.3, 0.4). c Contribution of active species during the activation of PMS for BPA degradation in NC-FeMnx(TA800) (x = 0.1, 0.2, 0.3, 0.4) with different iron-to-manganese ratios. d Iron and manganese content on NC-FeMn(TA800) before reaction and iron dissolution rate after reaction. e Adsorption energy of PMS adsorbed on different sites. f EPR of NC-FeMn(TA)/PMS systems. g57Fe Mössbauer spectrum of used NC-FeMn0.3(TA800) measured at room temperature.
