RESEARCH / A0334
Enhancing Stability and Activity of Fe-Based Catalysts for Propane Dehydrogenation via Anchoring Isolated Fe-Cl Sites
Read the original paper · 10.1002/cssc.202402408 ↗
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. Catalyst structure characterization: AC-HAADF-STEM images of the fresh (a) Fe/Al2O3 and (b) Fe Cl/Al2O3. (c) 27Al 1D MAS NMR spectra of γ-Al2O3, (Cl) γ-Al2O3 after alkali etching, Fe/Al2O3, and Fe Cl/Al2O3. (d) Fe 2p core-level XPS spectra for Fe Cl/Al2O3 and Fe/Al2O3. (e) TEM-EDS mapping image of fresh Fe Cl/Al2O3 (Al, O, Fe, and Cl). (f) FT-EXAFS spectra of Fe foil, α-Fe2O3, FeO, Fe/Al2O3, and Fe Cl/Al2O3.
Figure 3. Structural stability of Fe Cl/Al2O3 catalyst: (a) FT-EXAFS spectra for each regeneration of Fe Cl/Al2O3 catalyst. (b) FT-EXAFS spectra for used FeAl2O3 and used Fe Cl/Al2O3. (c) Thermogravimetric spectra of Fe/Al2O3 and Fe Cl/Al2O3 catalysts after reaction for 20 h. (d) The corresponding Raman spectra of the Fe Cl/Al2O3 catalyst were obtained after five successive regeneration reactions.