Fig. 4: Evaluation of two-electron ORR activity and selectivity of Pb SA/OSC using RRDE. | Nature Communications

Fig. 4: Evaluation of two-electron ORR activity and selectivity of Pb SA/OSC using RRDE.

From: Constructing sulfur and oxygen super-coordinated main-group electrocatalysts for selective and cumulative H2O2 production

Fig. 4

a Electrochemical oxygen reduction polarization curves (solid lines) along with H2O2 detection currents (dashed lines) for Pb SA/OSC, Pb SA/OC and OSC in O2-saturated 0.10 M KOH electrolyte. b H2O2 selectivity based on the RRDE measurements. c Tafel slopes of different catalysts derived from kinetic current for H2O2 production. d Schematic illustration of the experimental setup for in-situ ATR-SEIRAS measurements. WE working electrode, CE counter electrode, RE reference electrode. e In-situ ATR-SEIRAS spectra collected on the Pb SA/OSC catalyst in O2-saturated 0.10 M KOH catholyte at various potentials ranging from 0.9 to 0.1 V vs RHE. f LSV of Pb SA/OSC in N2-saturated 0.10 M KOH electrolyte containing 1 mM, 5 mM, 10 mM, or 20 mM H2O2. g Schematics of the electrochemical cumulative H2O2 production on the main-group metal catalysts (left) and transition metal catalysts (right).

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