fig2

Figure 2. (A-C) SEM images of Ti/Fe₂O₃, Ti/Fe₂O₃/Cu₂S, and Ti/Fe₂O₃/Cu₂S/Co(OH)_x photoanodes; (D and E) HRTEM images of Ti/Fe₂O₃/Cu₂S/Co(OH)_x photoanode; (F) SAED images of Ti/Fe₂O₃/Cu₂S/Co(OH)_x photoanode; (G) STEM image of Ti/Fe₂O₃/Cu₂S/Co(OH)_x photoanode; (H-L) EDS mapping (Fe, O, Cu, S and Co) of Ti/Fe₂O₃/Cu₂S/Co(OH)_x photoanode. SEM: Scanning electron microscope; HRTEM: high-resolution transmission electron microscopy; SAED: selected area electron diffraction; STEM: scanning transmission electron microscopy; EDS: energy dispersive spectroscopy.