Figure 6. Dependence of potential on current density for oxygen electrodes with the active layer in an amount of 0.02 g/cm2 consisting of initial MWCNTs (1) and MWCNTs oxidized with potassium permanganate which were reduced to RGO with sodium sulfite (2) and sodium hypophosphite (3)

From

Influence of the synthesis conditions of reduced graphene oxide on the electrochemical characteristics of the oxygen electrode

M.O. Danilov, I.A. Slobodyanyuk, I.A. Rusetskii, G.I. Dovbeshko, G.Ya. Kolbasov

Nanoscience and Nanotechnology Research. 2014, 2(1), 12-17 doi:10.12691/nnr-2-1-3