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Figure 4. (A) A-SMSI and Classical SMSI overlayer structure and behavior. Reproduced with the permission of Ref.[54]. Copyright 2017, Springer Nature. (B) Structural change of Cu/ZnO/Al2O3 catalyst after different pretreatments and the corresponding elemental distribution from transmission electron spectroscopy images. The DFT simulations over (C) Cu/ZnO/Al2O3. Reproduced with the permission of Ref.[57]. Copyright 2022, Springer Nature. (D) Au55@Ti/SiO2 model with two TiOx atomic layers. Reproduced with the permission of Ref.[58]. Copyright 2019, American Chemical Society.