Fig. 4: Catalysts and oxygen local confinement structure of the cathode for H2O2 production.

a RRDE tests of Mo-SACs/mrG under O2-purged 0.4 M NaHCO3 electrolytes. b FE of H2O2 productions over Mo-SACs/mrG obtained by RRDE tests at various applied voltages. c LSV scan of the PTFE@Mo-SACs/mrG-GDE, PTFE@mrG-GDE and Mo-SACs/mrG-GDL electrodes under an O2-purged 0.4 M NaHCO3 electrolyte. d Scheme of the structure of the PTFE@Mo-SACs/mrG-GDE electrode. e Potential at 10 mA/cm2 and corresponding H2O2 FE of PTFE@Mo-SACs/mrG-GDE, PTFE@mrG-GDE and Mo-SACs/mrG-GDL electrodes. The pentagram represents the H2O2 efficiency, and the blue rectangle represents the onset potential at 10 mA/cm2.