Fig. 3: Structural evolution of different Fe catalysts under reactive atmospheres.
From: Upgrading CO2 to sustainable aromatics via perovskite-mediated tandem catalysis
In situ XRD patterns of (a) Fe2O3, (b) ZnFe2O4 and (c) LaFeO3 under different reductive atmosphere. Test conditions: T = 350 °C, P = 0.8 MPa and H2 (the first 4 h) or CO2/H2 = 1:3 (the subsequent 20 h). d Fe K-edge Fourier-transform extended X-ray absorption fine structures (FT-EXAFSs). e Fe K-edge wavelet transform (WT)-EXAFSs of spent Fe2O3, ZnFe2O4, and LaFeO3 catalysts. High-angle annular dark-field scanning transmission electron microscopy (STEM), integrated differential phase contrast (iDPC) STEM images, and intensity profiles of the iDPC-STEM images along imaginary line of spent (f) Fe2O3 and (g) LaFeO3. The insets show the atomic structure with spheres in red, black, brown, and green representing O, C, Fe, and La atoms, respectively.
