Chemical Vapor Deposition of FeOCl Nanosheet Arrays and Their Conversion to Porous α-Fe2 O3 Photoanodes for Photoelectrochemical Water Splitting.

FeOCl nanosheet arrays were deposited on fluorine-doped tin oxide glass substrates through a chemical vapor deposition method and further converted to hematite porous nanosheet arrays. A much enhanced photocurrent was obtained for such hematite films, which was three times higher than that of a planar hematite film at 1.23 V versus a reversible hydrogen reference electrode.