fig5

Figure 5. (A) Reaction mechanism and rate of propane oxidation over Pt/WO_x/t-ZrO₂ and Pt/WO_x/m-ZrO₂ catalysts. Reproduced with permission from Ref.^[83]; (B) Relationship between the propane conversion rate and reaction temperature of Pt-Nb/Al₂O₃ catalysts. Reproduced with permission from Ref.^[40]; (C) Light-off curves for propane oxidation over Pt/CeO₂-yPO_x catalysts. Reproduced with permission from Ref.^[57]; (D and E) Light-off curves (D) and reaction rates (E) for C₃H₈ oxidation over Pt/F-TiO₂ and Pt/TiO₂. Reproduced with permission from Ref.^[50].