Fig. 3: Synthesis and structure characterizations of Fe–P–C SAC.
From: Tandem reductive amination and deuteration over a phosphorus-modified iron center
a The scanning transmission electron microscopy image (insertion: X-ray diffraction), b elemental mapping of Fe/P/C, c high-angle annular dark-field scanning transmission electron microscopy image (the relative bright and dark white dots are Fe atoms and P atoms respectively, Z = atomic massFe/atomic massP), d P 2p X-ray photoelectron spectroscopy, e the normalized X-ray absorption near-edge spectra (XANES) at the P L2,3-edge, f the XANES at the Fe K-edge (FePc: iron phthalocyanine), g the k2-weighted Fourier transform extended X-ray absorption fine structure spectra (EXAFS) in r-space (k is the wavenumber, k = (2me(E – E0))1/2/h, where h is Planck’s constant), h wavelet transformation for the k2-weighted EXAFS signal, and i EXAFS fitting curve in the region of 1.0–2.3 Å, shown in k2-weighted r-space of Fe–P–C SAC and references.
