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

Figure 4

(a, b) Current density-voltage curves. (c) Transient photocurrent responses (I–t) for Fe₂O₃ and FeOOH/Fe₂O₃ samples under visible light irradiation at 1.23 V vs. RHE. (d) Injection efficiency at 1.23 V vs. RHE for the Fe₂O₃ and FeOOH/Fe₂O₃ photoanodes.

(a)

(b)

(c)

(d)