fig6

Figure 6. (A) Characteristics of mono-μ-oxo dimeric copper sites formed in oxygen-activated Cu-MFI materials at different Cu/Al ratios. Reprinted with permission from ref^[111]. Copyright 2022. American Chemical Society; (B) Structures of different copper sites hosted in zeolites with different topologies and their evolution during the reaction with methane. Reprinted with permission from ref^[121]. Copyright 2023. American Chemical Society.