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. 2017 Mar 20;56(24):6946–6951. doi: 10.1002/anie.201700271

Figure 4.

Figure 4

a) Cyclic voltammograms of a bare GC electrode (O2‐saturated) and after TIPS‐CMP drop‐casting (Ar‐saturated and O2‐saturated) in aqueous ultrapure 0.1 m KOH (scan rate: 10 mV s1, rotating speed: 1600 rpm). b) Cyclic voltammograms of a drop‐casted TIPS‐CMP on GC electrode at different rotating speeds in O2‐saturated aqueous 0.1 m KOH (inset: Koutecky—Levich analysis of the limiting currents measured at 0.55 V). c) Possible ORR mechanisms in alkaline solution, with the two‐ and four‐electron reaction pathways highlighted. RHE=reversible hydrogen electrode.