Figure 2
ORR activity of M-OMPC catalysts.
(a) ORR polarisation curves of M-OMPC (M = FeCo, Fe, Co), FeCo-OMPC(L), OMPC and FeCo-KB catalysts in O2-saturated 0.1 M HClO4. (b) Tafel plots derived from the corresponding ORR polarisation curves after mass transport correction. (c) Number of electrons transferred during ORR calculated based on ring currents. For all RRDE measurements, the catalyst loadings were 0.6 mg cm−2. The electrode rotation speed was 1600 rpm and the scan rate was 5 mV s−1.
