Fig. 3: XAFS measurements of different samples at the Cr K-edge.

a XANES spectra. The inset displays a magnified view of the pre-edge peak A. b k³-weighted FT-EXAFS spectra in R-space. EXAFS fitting curves of Ru–Cr₁(OH)_x−1.1 in R (c) and k (d) space. e WT for the k³-weighted EXAFS of different samples.