Fig. 3: Quasi-steady-state reaction kinetics of BiVO4 photoanode in different eletrolytes.
From: Determining kinetics of H2O2 evolution from photoelectrochemical water oxidation
a Wavelength-dependent PIA amplitudes on the equilibrium plateau in three electrolytes (illumination: 456 nm LED, 2.5 mW/cm2). b Compare the PIA amplitudes and photocurrents under illumination (456 nm LED, 4.82 mW/cm2) (PBS: 1.8 VRHE, NaHCO3: 1.8 VRHE, Na2SO3: 1.4 VRHE, the potential is not iR corrected.). c Relationship of quasi-steady-state PIA amplitudes at 543.5 nm against the light pulse intensity (PBS: 1.8 VRHE, NaHCO3: 1.8 VRHE, Na2SO3: 1.4 VRHE, the potential is not iR corrected.). The solid lines are only trend lines and are used to guide the eye. d Reaction rate versus surface hole density. Hole density of x-axis is obtained from the integrated charges in PMPS results (Figs. S8 and S11-S13), and photocurrent of y-axis is obtained from the steady-state photocurrent in PMPS results (Figs. S8 and S11–S13); half-solid symbol: AM 1.5 G (100 mW/cm2); blank symbol: 456 nm LED (2.5 mW/cm2); dash line: linear fit or turning point of first-order to three-order.
