Fig. 2: Structural characterization and interface properties of the Fe&CZA-spent and FeCo&CZA-spent catalysts after CO2 hydrogenation.
From: Transformation of CO2 to C2+ alcohols by tailoring the oxygen bonding via Fe-based tandem catalyst
a XRD patterns of the Fe&CZA-spent and FeCo&CZA-spent catalysts. b Fourier transforms (FT) of the k3-weighted EXAFS spectra of the Fe&CZA-spent and FeCo&CZA-spent catalysts at the Fe K-edge. c AC-HAADF-STEM and EDX-mapping images of FeCo&CZA-spent catalyst. d Schematic illustration of the phase evolution of the FeCo component in FeCo&CZA catalyst during reduction and reaction processes. e TPO-MS profiles of the FeCo alloy carbide and monometallic Fe carbide with ca. 10% water/He feeding. f Surface configurations of bonded O atoms on Fe5C2(510) and (Fe3/4Co1/4)5C2(510) models and the corresponding binding energies under high O coverage. g Crystal orbital Hamilton populations (COHP) analysis of O* adsorption on Fe5C2(510) and (Fe3/4Co1/4)5C2(510) surfaces.
