RESEARCH / A0004
Synergistic Dual‐Channel Charge Separation in Cr‐TiO2‐x for Solar H2O2 Synthesis
Read the original paper · 10.1002/ange.6447296 ↗
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 1 Characterization of the coordination environment of Cr single atoms and the overall structure of Cr-TiO2-x. (a) The AC-HAADF-STEM image with individual Cr atoms highlighted by a yellow frame. The inset displays the local atomic distribution map of Cr-TiO2-x. (b) Fourier transform of EXAFS spectra of Cr-foil, Cr2O3, CrO2, and Cr-TiO2-x. (c) Normalized Cr K-edge XANES spectra of Cr foil, Cr2O3, CrO2, Cr-TiO2, and Cr-TiO2-x. The illustration shows a partial magnified view. (d) EPR spectra of Cr-TiO2-x. (e) O K-edge XAFS spectra of Cr-TiO2 and Cr-TiO2-x. (f) Relation between the relative area of the Kβ′ peak with regard to that of the overall Kβ line and the spin state of the reference compounds (filled black dots), along with the corresponding linear fit of the XES. The inset shows a schematic diagram of the spin state fit of Cr-TiO2-x.