Effect of Posttreatment on the Catalytic Performances of Fe-N-C for Oxygen Reduction Reactions

Figure 2

TEM images of (a) FeDN, (b) FeDN-AT, (c) FeDN-AT-300, (d) FeDN-AT-500, and (e) FeDN-AT-700, (f–h) HR-TEM images of FeDN-AT-700, (i) IFFT image based on the FFT pattern of the insert in (g).