fig8

Figure 8. (A) Photocatalytic Reaction Pathway of Ag–AgBr/TiO₂; (B) Long-term C₂H₆ production rate and selectivity under 6 bar pressure over Ag–AgBr/TiO₂. Reproduced with permission from Ref^[56]. Copyright 2023, American Chemical Society; (C) Proposed photocatalytic oxidative coupling of methane process over Au/TiO₂; (D) Stability test of Au/TiO₂ under the optimized reaction condition (reaction condition: 20 mg TiO₂, 320 mL/min CH₄, 12 mL/min air, 393 K, 365 nm LED 100 W). Reproduced with permission from Ref^[55]. Copyright 2023, Springer Nature; (E) Schematic illustration of the proposed reaction mechanism for photocatalytic OCM to C₂H₆ using O₂ and H₂O on Ag₃PO₄-ZnO from the energy band structure and (F) the reaction mechanism; (G) Continuous stability tests in photocatalytic oxidative coupling of methane process on Ag₃PO₄-ZnO. Reproduced with permission from Ref^[58]. Copyright 2023, American Chemical Society. LED: Light emitting diode; OCM: oxidative coupling of methane.