Fig. 3From: Nanochannel-Controlled Synthesis of Ultrahigh Nitrogen-Doping Efficiency on Mesoporous Fe/N/C Catalysts for Oxygen Reduction Reactiona EIS bode plot of m-Fe/N/C-800, m-Fe/N/C-900, and m-Fe/N/C-950; the inset is the corresponding Nyquist plot. b Raman spectra of m-Fe/N/C-800, m-Fe/N/C-900, and m-Fe/N/C-950Back to article page