fig2
Figure 2. (A) CV acquired in N2 and O2 saturated KOH 0.1 M solution for MW-oxHT (2) at 10 mV/s in the +0.1 ÷ -0.9 V vs. Ag/AgCl/KClsat. potential range; [B(i)] LSV curves acquired for p-MWCNTs, MW-oxRT (1) and MW-oxHT (2) in O2-saturated KOH 0.1 M solution at 900 rpm at the GC disk electrode and [B(ii)] correspondent curves registered at the Pt-ring electrode; (C) K-L plot of MW-oxRT (1) and MW-oxHT (2) extrapolated from respective LSV curves at -0.4 V. CV: Cyclic voltammograms; LSV: linear sweep voltammograms; MWCNTs: multi-walled carbon nanotubes; GC: glassy carbon.
