RESEARCH / A0406
Engineering oxide speciation in CoMnOx catalysts for achieving an ideal selective oxidation of benzyl alcohol at room temperature with atmospheric pressure air
Read the original paper · 10.1016/j.jcis.2025.137369 ↗
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. (A) Normalized Co K-edge XANES spectra of Co foil, Co2Mn1, Co0.5Mn1 catalysts and Co3O4 standard sample; (B) Normalized Mn K-edge XANES spectra of Mn foil, Co2Mn1, Co0.5Mn1 catalysts and Mn3O4 standard sample; (C) Fourier transform (FT) of k3-weighted Co K-edge EXAFS spectra of Co foil, Co2Mn1, Co0.5Mn1 catalysts and Co3O4 standard sample; (D) Fourier transform (FT) of k3-weighted Mn K-edge EXAFS spectra of Mn foil, Co2Mn1, Co0.5Mn1 catalysts and Mn3O4 standard sample; Co 2p (E), Mn 2p (F) and O 1s (G) XPS spectra of CoMnOx catalysts (OOH: oxygen in surface hydroxyl species; Oads: oxygen adsorbed on catalysts surface; Olatt: lattice oxygen); (H) Co3+/Co2+ and Mn3+/Mn2+ ratio calculated by the fitting curves in E–F.