Fig. 4: ORR performance of Co-N4 and Co-N4-NP. | Nature Communications

Fig. 4: ORR performance of Co-N4 and Co-N4-NP.

From: Steering acidic oxygen reduction selectivity of single-atom catalysts through the second sphere effect

Fig. 4

a The polarization curves of disk current density and ring current in 0.10 M HClO4 with iR correction at 1600 rpm. b The calculated H2O2 selectivity as a function of the applied potential. c Mass activity comparison at 0.5 V vs. RHE for Co-N4-NP and previously reported catalysts. d The corresponding Tafel plots. e Schematic illustration of MEA for H2O2 electroproduction. f Chronoamperometry stability tests of Co-N4-NP at 0.6 V for 100 h.

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