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. 2015 Feb 27;1(1):e1400129. doi: 10.1126/sciadv.1400129

Fig. 3. Electrocatalytic activities of the carbon-based metal-free catalysts in half-cell tests.

Fig. 3

(A) CVs of the N-G-CNT in O2- or N2-saturated 0.1 M KOH. (B) Linear sweep voltammetry (LSV) curves of the N-G-CNT compared with Pt/C (20%) electrocatalyst by RRDE in O2-saturated 0.1 M KOH solution at a scan rate of 10 mV s−1 and a rotation speed of 1600 rpm. (C and D) LSV curves of the N-G and N-CNT compared with the N-G-CNT in O2-saturated 0.1 M KOH (C) and 0.1 M HClO4 (D).