Fig. 3: Characterizations of composition and electronic structure for biomass-derived SAC catalysts. | Nature Communications

Fig. 3: Characterizations of composition and electronic structure for biomass-derived SAC catalysts.

From: Achieving pH-universal oxygen electrolysis via synergistic density and coordination tuning over biomass-derived Fe single-atom catalyst

Fig. 3: Characterizations of composition and electronic structure for biomass-derived SAC catalysts.

a, b XRD patterns of the CA-Fe@BC, Fe@BC, CA-BC, and BC catalyst, c the N2 sorption isotherms and d the pore size distributions of the CA-Fe@BC and Fe@BC catalysts (inset: the magnification of dashed box region), e, f Raman spectra, high-resolution XPS spectra of g N 1 s XPS spectra of the CA-Fe@BC-ng catalyst, h Fe 2p, i 57Fe Mössbauer spectra of the CA-Fe@BC catalyst (inset: the magnification of dashed box region), j Fe K-edge X-ray absorption near edge structure (XANES) spectra of the CA-Fe@BC and Fe@BC. k Fourier transformed (FT) k3-weighted w(k)-function of the extended X-ray absorption fine structure (EXAFS) spectra for the Fe K-edge of the CA-Fe@BC and Fe@BC, l, m the corresponding Fe K-edge EXAFS fitting curves of the CA-Fe@BC and Fe@BC. Source data for a–m are provided as a Source Data file.

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