Fig. 2. Characterizations of Mo_x-Ni_0.85Se/MoSe₂. (a)–(c) The XANES spectra of Ni, Mo, and the Se K-edge, and (d)–(f) the corresponding FT-EXAFS spectra for Mo_x-Ni_0.85Se/MoSe₂, NiSe₂, MoSe₂, Ni foil, Mo foil, and Se foil. The wavelet transform of (g) the Ni K-edge and (h) the Mo K-edge EXAFS for Mo_x-Ni_0.85Se/MoSe₂, NiSe₂, Ni foil, MoSe₂, and Mo foil. The XPS spectra of (i) Ni 2p, (j) Mo 3d, and (k) Se 3d for Mo_x-Ni_0.85Se/MoSe₂.