Fig. 1: Structural characterizations of Fe-SAC-x. | Nature Communications

Fig. 1: Structural characterizations of Fe-SAC-x.

From: Facile cascade-anchored synthesis of ultrahigh metal loading single-atom for significantly improved Fenton-like catalysis

Fig. 1

a, b HRTEM and elemental mappings of Fe-SAC-41.31. c–f HAADF-STEM images of Fe-SAC-x with metal loads was 41.31 wt%, 5.16 wt%, 15.82 wt% and 24.62 wt%, respectively. g X-ray diffraction (XRD) patterns of as-prepared Fe-SAC-x (the shaded area shows the trend of signal intensity changes with increasing Fe loading). h N2 sorption isotherms and pore size distribution (inset) for iron-anchored catalysts with different iron loadings. i Normalized XANES spectra of Fe-SAC-x samples (the inset figure is an enlarged version of the near-edge data). j The oxidation state of iron decreased with the increase of metal loading (the relationship between Fe K-edge energy and Fe valence state was fitted with a linear regression model: y = ax − b.). k k3-weighted Fourier transforms. l The wavelet transform of the experimental EXAFS spectra of the indicated catalysts. Scale bars: a, b 100 nm, c–f 5 nm.

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