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Low Temperature Green Synthesis of Sulfur-Nitrogen Co- Doped Graphene as Efficient Metal-Free Catalysts for Oxygen Reduction Reaction

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Figure

Figure 1.  Schematic illustration of the synthesis of S-N co-doped reduced graphene oxide
Figure 2.  (a) TEM image of S-N-rGO and (b) TEM image and the corresponding selected-area electron diffraction pattern; (c) HRTEM image of S-N-rGO;(d) HRTEM of crumple zone in(c)
Figure 4.  XRD pattern and Raman spectra of S-N-rGO prepared at different temperatures
Figure 5  Comparison of LSV curves between S-N-rGO, S-rGO, and N-rGO electrode at 1600 rpm rotation in O2-saturated 0.1 M KOH at a scan rate of 5 mV s-1
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