Fig. 4: One-step two-electron ORR pathway for H2O2 photosynthesis. | Nature Communications

Fig. 4: One-step two-electron ORR pathway for H2O2 photosynthesis.

From: Photocatalytic H2O2 production over boron-doped g-C3N4 containing coordinatively unsaturated FeOOH sites and CoOx clusters

Fig. 4: One-step two-electron ORR pathway for H2O2 photosynthesis.

a RRDE polarization curves over BCN and CoOx-BCN-FeOOH at 1600 rpm in an O2-saturated 0.1 M KOH solution with a ring current (upper part) and disk current (bottom part). b H2O2 selectivity as a function of the applied potential (the inset shows the calculated average number of transferred electrons). c H2O2 generation rates of a series of samples under different reaction gases or different sacrificial agents. d DMPO spin-trapping EPR spectra recorded for •O2− under light irradiation for BCN, BCN-FeOOH, CoOx-BCN and CoOx-BCN-FeOOH. e H2O2 generation rates of BCN, BCN-FeOOH, CoOx-BCN and CoOx-BCN-FeOOH with different superoxide dismutase (SOD) concentrations. f Mass spectra of luminol after oxidation with hydrogen peroxide generated by photocatalysis with H218O over CoOx-BCN-FeOOH. The error bars (mean ± standard deviation) were obtained based on three independent photocatalytic experiments. Source data are provided as a Source Data file.

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