Fig. 3: Extraordinary fractionation of O2 induced by isotope labeling of interfacial oxygen via stripping-like voltammetry.
From: Adsorbed oxygen dynamics at forced convection interface in the oxygen evolution reaction
a Schematic of stripping-like voltammetry for isotopic labeling of *O based on MFC-MS; b Normalized partial current of O2 with 18O18O, 16O18O and 16O16O during stripping-like procedure. Reaction conditions: electrolytes 0.5 M H2SO4 with H216O and H218O (pH=0); pre-oxidation potential and time 1.5 V for 180 s; stripping potential range 0.5-1.8 V; scan rate 10 mV s−1. The potential was iR corrected (the uncompensated resistance: 21.13 Ω, the surface area: 0.02 cm2); c Isotopic abundance of the electrolyte at different stages during stripping-like voltammetry. Values are presented as the mean, with error bars indicating standard deviation (n = 3 replicates); d Effect of oxygen species formed by various pre-oxidation potentials on methanol oxidation. Reaction conditions: electrolytes 0.5 M H2SO4 with H216O (pH=0); pre-oxidation time 240 s; stripping potential range pre-oxidation potential -1.8 V; scan rate 10 mV s−1. Values are presented as the mean, with error bars indicating standard deviation (n = 3 replicates). Source data for the results are provided as a Source Data file.
