RESEARCH / A0393
Surface immobilization of single atoms on heteroatom-doped carbon nanospheres through phenolic-mediated interfacial anchoring for highly efficient biocatalysis
Read the original paper · 10.1039/d4sc07775j ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Fig. 3 Morphology and structural characterization of FeN3P-SAC. (a) SEM image and (b) TEM image of FeN3P-SAC. Scale bars, 5 mm and 1 mm. (c) HRTEM image and (d) SAED pattern of FeN3P-SAC. Scale bar, 1 mm. (e) TEM image and the corresponding EDX elemental mapping images of FeN3P-SAC. The white dashed circles indicate the distribution of Fe element within FeN3P-SAC. Scale bars, 200 nm. (f) AC HAADF-STEM image of FeN3P-SAC. Scale bars, 1 mm. (g) 3D topographic atom image of the white dashed area in (f) and corresponding atomic intensity profiles (bottom) along the line X–Y in (g). (h and i) High-resolution XPS spectra of N 1s (h) and P 2p (i) for FeN3P-SAC. (j) Fe K-edge XANES spectra for FeN3P-SAC and reference samples. (k) FT-EXAFS based on the Fe K-edge XANES spectra for FeN3P-SAC and reference samples in R space. (l) Fitting result and corresponding structural model of FeN3P-SAC. (m) WT EXAFS contour plots of the Fe K-edge for FeN3P-SAC.