Cerium modification of the MnOx–Na₂WO₄ system promotes the co-conversion of methane and carbon dioxide.

The dataset includes catalyst preparation information, catalytic performance data, cyclic stability tests, and physicochemical characterization results used to elucidate the role of CeO₂ in regulating oxygen transfer behavior.

The catalytic data include CH₄ conversion, CO₂ conversion, C₂⁺ product selectivity, and C₂⁺ production rate under different Ce contents and reaction conditions. Characterization datasets include XRD, TEM, N₂ adsorption–desorption, CO₂-TPD, H₂-TPR, O 1s XPS, in situ Raman, in situ FTIR, and isotope-labeling mass spectrometry results. These data provide insights into the relationship between CeO₂ incorporation, lattice oxygen regulation, oxygen exchange behavior, and selective methane conversion.