RESEARCH / A0342
Sulfur Bridge Geometry Boosts Selective FeIV═O Generation for Efficient Fenton-Like Reactions
Read the original paper · 10.1002/advs.202500313 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Figure 2. Atomic structural and chemical states analysis of as-prepared catalysts. a) Fourier-transformed magnitudes (FT|k3χ(k)|) of the experimental Fe K-edge EXAFS signals of catalysts and relevant references (Fe foil and FeS). b) The corresponding EXAFS fitting curves in R-space, along with the schematic Fe atomic structure models. c) WT plots of catalysts and relevant references. d) S 2p XPS spectra of catalysts. e) Fe K-edge XANES spectra of catalysts and relevant references. f) Projected density of states (PDOS) of Fe atoms in Fe1–Fe1/CN and Fe1–S–Fe1/CN. The grey-filled line corresponds to the Fermi level (Ef = 0), and the d-band center is also suggested with the dashed line. g) Fourier-transformed EXAFS spectra of atomic metal sites with or without S coordination. Insert: Loading comparison of M1–S/CN and M1–N/CN (M = Cu, Co, Ni, or Mn).