Fig. 2: Morphology and textural properties of MoO3-Fe2O3 redox catalysts.

(a) AC-HAADF-STEM image of 1Mo9FeAl. (b) EXAFS spectra at Mo K-edge for 1Mo9FeAl, Mo foil, MoO2, and MoO3. XRD patterns (c) and Raman spectra (d) of as-prepared redox catalysts. I, II, III, IV, and V are for FeAl, 1Mo15FeAl, 1Mo12FeAl, 1Mo9FeAl and 1Mo6FeAl, respectively. The a.u. stands for arbitrary units.