Fig. 4From: Enhanced Patterned Cocatalyst TiO2/Fe2O3 Photoanodes for Water-SplittingXPS spectra of TiO2/Fe2O3-ordered patterned photoanode for a C 1s, b O 1s, c N 1s, d Fe 2p, e Ti 2p, and f Sn 3dBack to article page