Room Temperature Surface Modification of Ultrathin FeOOH Cocatalysts on Fe₂O₃ Photoanodes for High Photoelectrochemical Water Splitting

Figure 5

(a) Nyquist plots of Fe₂O₃ and FeOOH/Fe₂O₃ photoanodes under xenon lamp, where the symbol and solid line represent experimental data and fitting results with (c, d) the equivalent circuit model for data fitting, as well as the fitting results. (b) Current density versus time measured at the potential of 1.23 V vs. RHE for the FeOOH/Fe₂O₃ photoanode.

(a)

(b)

(c)

(d)