Photocatalytic production of H2O2 and the properties of modified samples (Fig.3)

a, Photocatalytic reaction scheme of aerobic oxidation of alcohol coupled with H2O2 production. Experimental conditions: photocatalyst (0.5 g L-1) with 10 vol% EtOH under visible light illumination (λ ≥ 420 nm), T = 25°C, water or phosphate buffer (0.1 M, pH 7). b, Time profiles of H2O2 photoproduction at pH = 3. c, Apparent quantum yield (AQY) of H2O2 production as a function of irradiation wavelength (0.1 M phosphate buffer, pH 7). d, pH effect on the photocatalytic production of H2O2 over pure and modified GCN in 1 h irradiation. e, The Koutecky-Levich plots obtained via RDE measurements in KOH (pH 13) solution with continuous O2 purging at 0.12 V (vs. RHE).