Fig. 2: ORR performance of oxygen modified defective graphene catalysts. | Nature Communications

Fig. 2: ORR performance of oxygen modified defective graphene catalysts.

From: Unveiling the dynamic active site of defective carbon-based electrocatalysts for hydrogen peroxide production

Fig. 2: ORR performance of oxygen modified defective graphene catalysts.

a The polarization curves of O-PG, O-DG-5, O-DG-15 and O-DG-30 on RRDE at 1600 rpm in O2 -saturated 0.1 M KOH (scan rate: 10 mV s−1, resistance in RRDE test system: 21.3 ± 2.4, iR compensation rate: 95%). b The H2O2 faradaic efficiencies of O-PG, O-DG-5, O-DG-15 and O-DG-30 at 0.55 V vs. RHE (The error bars represent two independent samples). c The H2O2 faradaic efficiencies of PG, O-PG, DG-30 and O-DG-30 at 0.55 V vs. RHE. d The Schematic diagram of flow cell for H2O2 production. e The polarization curves of O-DG-30 on flow cell in Ar or O2 -saturated 0.1 M KOH (resistance in flow cell test system: 7.2 ± 1.6, iR compensation rate: 95%). f The H2O2 faradaic efficiencies of O-DG-30 on flow cell at different potentials (The error bars represent two independent samples). g The partial H2O2 current density and H2O2 production of O-DG-30 at different potentials (The error bars represent two independent samples).

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