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. 2023 Nov 1;13(22):14782–14791. doi: 10.1021/acscatal.3c01982

Figure 4.

Figure 4

Electrochemical ORR Performance of MnNC-CVD-1100. (A) Steady state rotating disk electrode (RDE) ORR Polarization curves were obtained in an O2-saturated 0.5 M H2SO4 electrolyte at room temperature, 900 rpm, and a loading of 0.8 mg cm–2. All potentials are versus the reversible hydrogen electrode (RHE). (B) The Tafel slopes were obtained from the RDE ORR polarization curve in A. (C) ORR activity of the MnNC-CVD-1100 catalyst initially poisoned with NO2, and recovered after stripping; in O2-saturated 0.5 M acetate buffer (pH 5.2) 0.27 mg cm–2 loading and a rotation rate of 900 rpm and scanned negatively at 5 mV/s. (D) NO2 stripping current from 0.2 to −0.3 V vs RHE with a scan rate of 10 mV s–1.