fig3

Figure 3. (A) NEXAFS curves of Ni K-edge with Ni foil reference (Ref.); (B) Zoom-in pre-edge area of Ni K-edge; (C) FT k²-weighted NEXAFS spectra of Ni single-atom-doped MoS₂ samples. NEXAFS: Near-edge X-ray absorption fine structure; FT: fourier-transform.