Steady-state and iR-free ORR polarization curves. Results were obtained in 0.1mKOH (O2 sat'd) at a scan rate of 10 mV s−1over a voltage range of 0.05–1.05 VRHE. The rotational speed of the rotating disk electrode (RDE) was 1600 rpm and the amounts of catalysts used for the measurements were 100 ugCatcm−2and 12 ugPtcm−2.
