Fig. 6From: Nanochannel-Controlled Synthesis of Ultrahigh Nitrogen-Doping Efficiency on Mesoporous Fe/N/C Catalysts for Oxygen Reduction ReactionSEM (a) and high-resolution TEM images (b–e) of m-Fe/N/C-900; f the pore-size distribution of m-Fe/N/C-900; the inset is nitrogen adsorption-desorption isothermsBack to article page