Fig. 5
From: Selectively nitrogen-doped carbon materials as superior metal-free catalysts for oxygen reduction
Stability and electron transfer number of catalysts for oxygen reduction in basic media. a–c Durability tests of the commercial carbon-based platinum catalyst (Pt/C) (a), pyridinic nitrogen-doped hydrogen-substituted graphdiyne (N-HsGDY) treated at 900 °C (N-HsGDY-900 °C) (b), and N-HsGDY treated at 1000 °C (N-HsGDY-1000 °C) (c) catalysts before and after 5000 cycles in O2-saturated 0.1 M KOH. d–f Electron transfer numbers and peroxide yields calculated from the rotating ring-disk electrode (RRDE) measurements for N-HsGDY treated at 800 °C (N-HsGDY-800 °C) (d), N-HsGDY-900 °C (e), and N-HsGDY-1000 °C (f)
