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Figure 10. Investigation of the promotional role of CeO_x-S clusters in electron transfer and the subsequent surface reaction. (A) In situ EPR signals of CeO_x-S/ZnIn₂S₄. (B) Quantitative analysis by the double integral of the EPR signals in a. (C) In situ FTIR spectra for the adsorption, activation, and reduction of CO₂ under visible light over CeO_x-S/ZnIn₂S₄. (D and E) Adsorption energies of CO₂ and (F and G) CO at different sites of Ce₆O₁₀-ZnIn₂S₄ (0001) determined by DFT calculations^[83]. Copyright 2018, Elsevier.