Fig. 3: ORR electrochemical activity of SeFe‒C2N in 0.1 M KOH.
From: Precisely designing asymmetrical selenium-based dual-atom sites for efficient oxygen reduction
a CV curves of in N2 (dashed line) and O2 (solid line). b ORR polarisation curves; series solution resistance (Rs) are 1.5, 2.0, 4.7, 3.3, and 3.2 Ω for C2N, Se‒C2N, Fe‒C2N, SeFe‒C2N, and Pt/C, respectively. c Half-wave potential (E1/2) and kinetic current density (JK) at 0.9 V. d Corresponding Tafel plots. e, f LSV curves of SeFe‒C2N at various rotation speeds (400‒2500 rpm) and calculated K‒L plots of SeFe‒C2N. g Electron transfer number and H2O2 selectivity of SeFe‒C2N. h Durability test of SeFe‒C2N for 10000 cycles. i Comparison of the catalytic activity of SeFe‒C2N with that of previously reported catalysts. All the potentials have not been iR-corrected.
