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. 2022 Nov 10;61(50):e202207089. doi: 10.1002/anie.202207089

Figure 3.

Figure 3

Electrochemical characterization of the sample in its pristine state and after partial Fe‐extraction in comparison with the Zn−N−C material, i.e. the carbon scaffold without any Fe. a) Capacitance‐corrected ORR curves recorded with an RDE setup at room temperature in O2‐saturated 0.1 M HClO4 at 1600 rpm, 10 mV s−1 (anodic scans) and b) respective Tafel plots showing purely the kinetic mass activity corrected for mass‐transport limitation; for Zn−N−C, since no limiting current is achieved, no correction has been applied. The plots clearly show that the carbon scaffold (Zn−N−C) does not contribute to the activity of the catalyst at 0.8 VRHE.