fig3

Figure 3. (A) ORR LSV curves, (B) Tafel curves, and (C) CV curves of Fe₃C@BNC, Fe₃C@NC, BNC, and Pt/C; (D) Electron transfer number and hydrogen peroxide yield of Fe₃C@BNC and Pt/C; (E) Chronoamperometric curves of Fe₃C@BNC and Pt/C; (F) OER LSV curves of Fe₃C@BNC, Fe₃C@NC, BNC, and RuO₂ in 1 M KOH electrolyte; (G) LSV curves of Fe₃C@BNC before and after 1,000 CV cycles; (H) LSV curves of ORR and OER of the catalysts in 0.1 M KOH electrolyte; (I) ΔE values of the catalysts. ORR: Oxygen reduction reaction; LSV: linear sweep voltammetry; CV: cyclic voltammetry; BNC: B, N-doped porous carbon; OER: oxygen evolution reaction.