fig4

Figure 4. XPS spectra of Ti/Fe2O3, Ti/Fe2O3/Cu2S, and Ti/Fe2O3/Cu2S/Co(OH)x photoanodes. (A) the survey spectra; (B) Fe 2p; (C) O 1s; (D) Cu 2p; (E) S 2p; and (F) Co 2p. XPS: X-ray photoelectron spectroscopy.
Figure 4. XPS spectra of Ti/Fe2O3, Ti/Fe2O3/Cu2S, and Ti/Fe2O3/Cu2S/Co(OH)x photoanodes. (A) the survey spectra; (B) Fe 2p; (C) O 1s; (D) Cu 2p; (E) S 2p; and (F) Co 2p. XPS: X-ray photoelectron spectroscopy.
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