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. 2025 Dec 17;11(51):eaea4543. doi: 10.1126/sciadv.aea4543

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Fig. 3. — (A) Ru K-edge XANES spectra of AC-MoRuO_x, Ru foil, and RuO₂. The inset is the extended image of the selected area. (B) Mo K-edge XANES spectra of AC-MoRuO_x, Mo foil, MoO₂, and MoO₃. The inset is the extended image of the selected area. (C) Ru K-edge FT-EXAFS in R spaces of AC-MoRuO_x, Ru foil, and fresh RuO₂. (D) Ru K-edge EXAFS fitting analyses for AC-MoRuO_x in the R space. (E) In situ XANES spectra of the Ru K-edge for AC-MoRuO_x at different voltages. The inset is the magnified image. (F) Ru valence states of AC-MoRuO_x fitted by Ru K-edge absorption energy at different potentials. (G) Ru K-edge FT-EXAFS 2D spectra of AC-MoRuO_x at different potentials.