Fig. 7
Cyclic voltammograms of CH_NaCl catalyst for the ORR obtained in N2 (1) and O2 (2) saturated 0.1 M KOH aqueous solution. Scan rate 50 mV/s (a); the moles of electrons involved in the ORR calculated from the Koutecky-Levich equation (b); polarisation plots of CH_NaCl catalyst for the ORR obtained O2 saturated 0.1 M KOH aqueous solution. Simulated curve (black line) yielded ohmic resistivity of the cell (c); catalytic Tafel plot derived from Koutecky-Levich treatment of rotating disk data of CH_NaCl catalyst in O2 saturated 0.1 M KOH aqueous solution (d); linear sweep voltammetry curves of CH_NaCl catalyst for the ORR obtained in oxygen saturated 0.1 M KOH aqueous solution. Scan rate: 10 mV/s. Electrode rotation rates as indicated (e).
