fig5

Figure 5. The amorphous substrates to increase active sites and prevent the agglomeration of single atoms: (A) HRTEM image of Ir₁/CoOOH. (B) HRTEM image of Ir₁/CoOOH (F). (C) HAADF-STEM image of Ir₁/CoOOH. (D) HAADF-STEM image of Ir₁/CoOOH (F). Reproduced with permission from Ref.^[94] Copyright 2023, Elsevier. (E) AC-HAADF STEM image and corresponding of In₁/a-MoO₃. (F) 3D intensity profile of In₁/a-MoO₃. Reproduced with permission from Ref.^[95] Copyright 2023, RSC. (G) DSC, (H) H₂-TPR curves of bare WO₃ and Pt/WO₃ hybrids. Reproduced with permission from Ref.^[100] Copyright 2018, Wiley-VCH. (I) CO stripping curves of Rh/C, Pt/C, Pd/C and Rh-SACs/HNCR. (J) Schematic diagram of the possible FAOR pathway for Rh-SACs/HNCR and Rh/C. Reproduced with permission from Ref.^[102] Copyright 2022, Wiley-VCH.