Figure 1.
a) Schematic illustration of the preparation process for Ni3S2‐Ni@NC‐AE NPs. b) EDS elemental mapping of Ni3S2‐Ni@NC‐AE. c,e,g,i) SEM and d,f,h,j) TEM images of c,d) NiS, e,f) NiS@PDA, g,h) Ni3S2‐Ni@NC, and i,j) Ni3S2–Ni@NC‐AE.
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