RESEARCH / A0320
Chlorine Axial Coordination Enables Peroxidase Mimicking and Lignin Depolymerization in Fe–N3O Single-Atom Nanozymes
Read the original paper · 10.1021/acsami.5c06333 ↗
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 3. (a) Fe K-edge XANES spectra of Fe−N/O/Cl−C SA and reference samples. (b) Average oxidation state of Fe in Fe−N/O−C SA and Fe−N/O/Cl−C SA in comparison with Fe foil, FeO, and Fe2O3. (c) Fourier transform magnitudes of the Fe K-edge EXAFS signals for Fe−N/O/ Cl−C SA and reference samples, performed without phase shift correction. (d−f) WT contour plots of Fe−N/O-C SA and Fe−N/O/Cl−C SA in comparison with FePc samples, respectively. (g) EXAFS fitting of Fe−N/O/Cl−C SA: experimental data (open circles) overlaid with the fitted curve (red line), incorporating contributions from Fe−N and Fe−Cl scattering paths. (h) Calculated formation energies of various Fe−N/O dualcoordination configurations. (i) Schematic model of Fe−N/O/Cl−C SA (Fe, brown; N, gray; O, red; C, dark brown).