fig5
Figure 5. (A) Ni1Cu2/g-C3N4 catalyst preparation process; (B) HAADF-STEM image of Ni1Cu2/g-C3N4 in which the yellow dashed circles represent isolated atoms, green rectangular dashed lines represent linear trimers, and red dashed triangles represent triangular trimers. (C) Statistics of single atoms, linear trimers and triangular trimers in Ni1Cu2/g-C3N4 using four different approaches[22], Copyright 2021, Springer Nature Limited; (D) Schematic illustration of the preparation process of the CoFeCu hydroxides[104], Copyright 2024 Elsevier B.V.; (E) The synthesis procedure of CoFeCe three-atom hydroxide[105], Copyright 2023 Elsevier Ltd; (F) Preparation process of
