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(A) The XANES spectra of Ni K-edge. (B) The Fourier transforms of k3-weighted Ni K-edge EXAFS spectra for NiO@Ni/WS2/CC, Ni foil and NiO. (C) Observed (black line) and calculated (red and blue line) Fourier transforms of k3-weighted Ni K-edge EXAFS spectra for NiO@Ni/WS2/CC. (D) The XANES spectra of W K-edge. (E) Fourier transforms of k3-weighted W K-edge EXAFS spectra for WS2/CC and NiO@Ni/WS2/CC. (F) The XANES spectra of Ni K-edge for WS2/CC and NiO@Ni/WS2/CC.
