Figure 2

Reproduced from ref40 with permission.
The structure of Ln-B2W22 nanocatalyst (Color code: W, dark blue; Ln, grey; O, red; B, purple).

Reproduced from ref40 with permission.
The structure of Ln-B2W22 nanocatalyst (Color code: W, dark blue; Ln, grey; O, red; B, purple).