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Figure 3
Ni K-edge k3χ(k) and their FT-EXAFS spectra of the NiMo(0.4) (a, c) and Ni(3) (b, d) catalysts. X-ray absorption spectra were measured at ambient temperature after sulfiding pretreatment at 613 K and 1.1 MPa using the high-pressure chamber equipped with PBI windows, whereas the broken line in (a) represents the Ni K-edge k3χ(k) spectrum of the NiMo(0.4) catalyst measured using the chamber equipped with beryllium windows. The FT range is indicated by kmin and kmax in the Ni K-edge k3χ(k) spectra.

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