Figure 3
Comparison of activity and durability of Pt/C and FeCo-OMPC.
(a) ORR polarisation curves of Pt/C and FeCo-OMPC catalysts in O2-saturated 0.1 M HClO4 at the scan rate of 1 mV s−1. (b) Corresponding kinetic currents of Pt/C and FeCo-OMPC catalysts at the scan rate of 1 mV s−1. (c) ORR polarisation curves of Pt/C and FeCo-OMPC catalysts before and after 10,000 potential cycles in O2-saturated 0.1 M HClO4. Potential cycling was carried out from 0.6 to 1.0 V vs. RHE at 50 mV s−1. (d) Comparison of kinetic currents of Pt/C and FeCo-OMPC catalysts before and after 10,000 potential cycles. For all RRDE measurements, the catalyst loadings were 0.6 mg cm−2 for FeCo-OMPC catalyst and 20 μgPt cm−2 for Pt/C. The electrode rotation speed was 1,600 rpm and the scan rate was 5 mV s−1.
