fig3
Figure 3. (A) Pt 4f XPS spectra and (B) catalytic activity of propane oxidation of Pt/CeO2, Pt/SnO2, Pt/ZrO2, and Pt/Nb2O5 catalysts. Reproduced with permission from Ref.[30]; XPS spectra of (C) Pt 4f and (D) O 1s of Pt/CeO2 and Pt/Nb2O5 catalysts. Reproduced with permission from Ref.[76]; (E) Catalytic activity of propane oxidation over Pt/CeO2 and Pt/Nb2O5 catalysts. Reproduced with permission from Ref.[76]. XPS: X-ray photoelectron spectroscopy.
