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Cyclic voltammogram conducted in 0.1 M KOH at a scan rate of 50 mV s−1 for IC-rGO, N-IC-rGO, and N-rGO modified glassy carbon electrodes in (A) argon-saturated and (B) oxygen-saturated environments. (C) Linear sweep voltammogram performed in 0.1M KOH with 2.0 mV s−1 for IC-rGO, N-IC-rGO and N-rGO. (D) Tafel plots constructed from linear sweep voltammogram (LSV) data for IC-rGO, N-IC-rGO, and N-rGO.
