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. 2016 Nov 18;1(5):971–980. doi: 10.1021/acsomega.6b00275

Figure 7.

Figure 7

(a) Cyclic voltammograms (CVs) obtained for the 3D N-GQDs/MoS2–rGO nanohybrid-modified electrode dipped into a N2- and O2-saturated 0.1 M KOH solution at a scan rate of 20 mV/s, (b) linear sweep voltammogram (LSV) obtained for the 3D N-GQDs/MoS2–rGO nanohybrid-modified electrode at a scan rate of 10 mV/s with different rotation speeds ranging from 400 to 2500 rpm, (c) Koutecky–Levich (K–L) plot for the 3D N-GQDs/MoS2–rGO-modified electrode with respect to various potentials, and (d) electron transfer number and peroxide yield for the 3D N-GQDs/MoS2–rGO nanohybrid at the whole potential range obtained from the rotating ring disc electrode (RRDE) voltammogram, as displayed in Figure S3.