Fig. 4: Performance of Mg–N–C as an oxygen reduction reaction catalyst. | Nature Communications

Fig. 4: Performance of Mg–N–C as an oxygen reduction reaction catalyst.

From: Turning main-group element magnesium into a highly active electrocatalyst for oxygen reduction reaction

Fig. 4

a LSV curves after normalization by glass carbon (GC) electrode in O2-saturated 0.1 M aqueous KOH electrolyte solutions at a sweep rate of 5 mV s−1. b Tafel slope of the catalysts in 0.1 M KOH solution. c The H2O2 yield and the electrons transfer rate of the catalysts in 0.1 M KOH solution. d Mg–N–C before and after accelerated durability test (ADT) with 5000 cycles from 0.8 to 1.1 V (vs. RHE) at a sweep rate of 100 mV s−1. e Methanol tolerance test of Mg–N–C at 0.8 V (vs. RHE) with 1600 rpm in O2-saturated 0.1 M KOH solution. 4 ml methanol is injected into 110 ml O2-saturated 0.1 M KOH solution at 400s. f CA test of the catalysts at 0.7 V (vs. RHE) with 400 rpm for 10 h in O2-saturated 0.1 M KOH solution. g LSV curves after normalization by glass carbon (GC) electrode in O2-saturated 0.1 M aqueous HClO4 electrolyte solution at a sweep rate of 10 mV  s−1. h CA test of Mg–N–C in 0.1 M HClO4 solution. i E1/2 for different catalysts in both alkaline and acidic solutions.

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