Fig. 3: Faradaic efficiency measurements of H2 and O2.
From: Wien effect in interfacial water dissociation through proton-permeable graphene electrodes
a Schematic of experimental setup. b Hydrogen flux ΦH2 as a function of current density I measured with a mass spectrometer (Supplementary Fig. 4). Solid red line marks the Faraday law ΦH2 = I/2 F, where F is the Faraday constant. c Oxygen flux ΦO2 as a function of I measured using the oxygen microsensor (Supplementary Fig. 5). Solid red line marks the Faraday law ΦO2 = I/4 F. Data obtained using a V-bias range from 0–3 V. Error bars, SD.
