Fig. 3: The oxygen vacancy density and adsorption-activation capacities of the catalysts for NO, CH₄, and O₂.

Ce L₃-edge XAFS spectra fitting results (a), O K-edge sXAS spectra (b), O K-edge sXAS fitting results (c), H₂-TPR (d), NO-TPO (e), and CH₄-TPSR (f) of catalysts.