fig2

Figure 2. (A) Schematic representation of a-Cu and c-Cu formation; (B) TEM image of a-Cu. Figure 2A and B is reprinted with permission from^[43]. Copyright 2018, John Wiley and Sons; (C) Structural evolution from pristine CeO₂ to B-doped CeO₂ (B-7.69%) upon boron incorporation; (D) TEM image of the B-doped CeO₂/GO nanosheet, with the insets displaying the selected area electron diffraction (SAED) pattern and high-resolution transmission electron microscopy (HRTEM) image; (E) Schematic of the synthesis procedure for B-doped CeO₂/GO nanosheet. Figure 2C-E is reprinted with permission from^[46]. Copyright 2025, John Wiley and Sons. PVP: Polyvinyl pyrrolidone; TEM: transmission electron microscopy; GO: graphene oxide.