(A) Normalized transient bleaching recovery curves monitored at 464 nm for TiCl4-treated TiO2 electrodes with adsorbed 3P-Ru dye, 3P-Ru dye +1-IrOx·nH2O, and 3P-Ru dye +2-IrOx·nH2O in pH 5.8 silicate buffer solution at open circuit. Kinetic fits are superimposed on the data. Calculated lifetimes (τ) were (i) 3P-Ru dye: 0.52 ms, (ii) 3P-Ru dye +1-IrOx·nH2O, 0.26 ms (iii) 3P-Ru dye +2-IrOx·nH2O, 0.15 ms. (B) Transient decays obtained at +100 mV vs. Ag/AgCl. Calculated lifetimes (τ) were (i) 3P-Ru dye: 0.72 ms, (ii) 3P-Ru dye +1-IrOx·nH2O, 0.44 ms (iii) 3P-Ru dye +2-IrOx·nH2O, 0.31 ms.