Fig. 5: Electrochemical performance of the catalysts in rotating ring-disk electrode (RRDE).
From: Host-guest-induced electronic state triggers two-electron oxygen reduction electrocatalysis
a LSV-RRDE without iR compensation. b The corresponding H2O2 selectivity profiles and the electron-transfer number in O2-saturated 0.1 M KOH electrolyte. c The 2e– ORR comparison. d The corresponding Tafel plots. e Cdl values. f The EIS spectra of HG-CD-Ph, HG-CD-TPB, P-CN-Ph, and P-CN-TPB. g Stability tests of HG-CD-Ph at a potential of 0.4 V vs RHE in O2-saturated 0.1 M KOH (test conditions: electrode area = 0.126 cm–2, resistance in RRDE test system = 16.8 ± 0.2 Ω). h The H2O2 selectivity, KH2O2, and FEH2O2 distributions of reported covalently bonded catalysts and metal-free organic supermolecule catalyst HG-CD-Ph (this work).
