Fig. 1From: Modulating the electrocatalytic activity of N-doped carbon frameworks via coupling with dual metals for Zn–air batteriesStructure of MnCoNCF before annealing. a TEM, b HR-TEM (inset: FFT-pattern), and c Elemental mapping images of MnCo-NCF precursors (scale bar is 100 nm). d FT-IR spectrum of MnCo-NCF before annealingBack to article page