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. 2022 Jan 25;13:484. doi: 10.1038/s41467-022-28146-6

Fig. 3. Electrochemical measurements and characterizations of typical samples.

Fig. 3

a Linear sweep voltammetry curves of typical samples in the 100 mM sodium phosphate buffer solution (pH 6.0) containing 5 mM K3[Fe(CN)6]. b EIS spectra of typical samples in a 100 mM sodium phosphate buffer solution (pH 6.0) containing 5 mM K3[Fe(CN)6]. SCE, saturated calomel electrode. c Photocurrent density-potential curves of BiVO4, CoOx/BiVO4, and FeCoOx/BiVO4. d EIS spectra of BiVO4, CoOx/BiVO4, and FeCoOx/BiVO4 in a 100 mM sodium phosphate buffer solution (pH 6.0). e Comparison of difference of OCPs on the BiVO4, CoOx/BiVO4, and FeCoOx/BiVO4 under dark and illumination conditions. Measurements were taken at least three times for separate samples and average values are presented with the standard deviation as the error bar. f Comparison of promotion effect of cocatalysts on the SPV values of the BiVO4 photocatalyst under chopped visible light irradiation.