Fig. 4
From: Selectively nitrogen-doped carbon materials as superior metal-free catalysts for oxygen reduction
Performance of catalysts in alkaline media. a–d Linear sweep voltammetry curves of pyridinic nitrogen-doped hydrogen-substituted graphdiyne (N-HsGDY) treated at 700 °C (N-HsGDY-700 °C) (a), N-HsGDY treated at 800 °C (N-HsGDY-800 °C) (b), N-HsGDY treated at 900 °C (N-HsGDY-900 °C) (c), and N-HsGDY treated at 1000 °C (N-HsGDY-1000 °C) (d), compared to commercial carbon-based platinum catalyst (Pt/C (JM)) for the oxygen reduction reaction (ORR). e Comparison of current density at 0.85 V vs. reversible hydrogen electrode (RHE) of Pt/C, N-HsGDY catalysts in this work and previously reported metal-free catalysts3,4,7,8,11,40,41,42,43. f Schematic diagram for the catalytic process for ORR with N-HsGDY
