Figure 4 | Scientific Reports

Figure 4

From: General Solvent-dependent Strategy toward Enhanced Oxygen Reduction Reaction in Graphene/Metal Oxide Nanohybrids: Effects of Nitrogen-containing Solvent

Figure 4

The ORR activities of CNG nanocomposites.

(a) CVs of CNG samples and Pt/C in 0.1 M aqueous KOH with N2-saturated (dashed lines) and O2-saturated (solid lines) conditions. (b) LSVs of CNG-DMF in O2-saturated 0.1 M KOH at a scan rate of 5 mV/s with a range of rotation rates from 400 to 2025 (rpm). (c) The comparison of RRDE results of CNG samples at a rotation rate of 1600 rpm. Ir and Id represent the ring and disk currents, respectively. The peroxide percentage (d), electron transfer numbers (e), and Tafel plots (f) of CNG composites.

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