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Fig. 5 | Nanoscale Research Letters

Fig. 5

From: A Nanopore-Structured Nitrogen-Doped Biocarbon Electrocatalyst for Oxygen Reduction from Two-Step Carbonization of Lemna minor Biomass

Fig. 5

a LSV curves for ORR of CDW-300, NPNC-600, NPNC-700, and NPNC-800 in O2-saturated 0.1 mol l−1 KOH electrolyte. b CV curves for NPNC-700 in Ar versus O2 saturated 0.1 mol l−1 KOH electrolyte. c ORR polarization curves of CDW-300, NPNC-600, NPNC-700, NPNC-800, and 20 wt% Pt/C in 0.1 mol l−1 KOH electrolyte under O2 protection. d ORR polarization curves of NPNC-700 and 20 wt% Pt/C before and after the CCT. e ORR polarization curves of NPNC-700 in O2-saturated 0.1 mol l−1 KOH electrolyte at different rotation rates. f Koutecky-Levich plots of j d −1 versus ω −1/2 obtained from e

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