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a,b) LSV curves of N/C‐900, Fe3C‐Fe,N/C‐900, and Pt/C at 1600 rpm and c,d) LSV curves of Fe3C‐Fe,N/C‐900 at different rotating speeds in 0.1 m KOH and 0.1 m HClO4 (insets are the corresponding Koutecky–Levich plots), respectively. e,f) LSV curves of Fe3C‐Fe,N/C‐900 and Pt/C before and after 5000 cycles in 0.1 m KOH and 0.1 m HClO4 at 1600 rpm, respectively. The scan rate is 10 mV s−1.
