RESEARCH / A0585
Modulating the electronic spin state of atomically dispersed iron sites by adjacent zinc atoms for enhanced spin-dependent oxygen electrocatalysis
Read the original paper · 10.1016/j.checat.2023.100758 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Figure 2. Structural characterizations of the as-prepared catalysts (A and B) Aberration-corrected HAADF-STEM and enlarged image of Fe,Zn/N-C. (C) Raman spectra of all samples. (D) High-resolution Fe 2p XPS spectra of Fe/N-C and Fe,Zn/N-C. (E) High-resolution XPS Zn 2p spectra of Zn/N-C and Fe,Zn/N-C. (F) WT contour plots of Fe,Zn/N-C. (G) XANES of Fe K-edge for Fe,Zn/N-C and Fe foil. (H) FT EXAFS in R space for Fe,Zn/N-C and Fe foil. (I) Corresponding EXAFS fitting curves at the Fe K-edge of Fe,Zn/N-C. (J) XANES of Zn K-edge for Fe,Zn/N-C and Zn foil. (K) FT EXAFS in R space for Fe,Zn/N-C and Zn foil. (L) Corresponding EXAFS fitting curves at the Zn K-edge of Fe,Zn/N-C.