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. 2024 Dec 30;15:10758. doi: 10.1038/s41467-024-55041-z

Fig. 4. Coordination analysis of Fe sites obtained at different pyrolysis temperatures.

Fig. 4

a Normalized Fe K-edge XANES spectra of Bacillus pumilus-derived carbon materials. b The magnified corresponding near-edge region of Fe K-edge XANES spectra. c First derivative of the normalized Fe K-edge X-ray absorption spectra. d Fe K-edge EXAFS (points) and curve fit (lines) for Fe species in Bacillus pumilus-derived carbon materials shown in k3-weighted R-space after Fourier transformation; the data are not phase corrected.