fig3
Figure 3. Redox study. (A) In-situ O1s X-ray photoelectron spectra of MnOx/CeO2(0.05) under different redox conditions. Inset: the dependences of Osur capacities on redox conditions. (B) In-situ Raman spectra of MnOx/CeO2(0.05) and CeO2 under different conditions.