Facile Growth of Porous Hematite Films for Photoelectrochemical Water Splitting

Figure 2

Cross-sectional SEM images of porous α-Fe₂O₃ films grown in FeCl₃ aqueous solution. (a) Fe0.02, (b) Fe0.05, (c) Fe0.10, and (d) Fe0.15.

(a)

(b)

(c)

(d)