Abstract
Catalytic and structural effects of copper incorporation into Na2O–MnOx catalysts used for the oxidative dimerization of methane have been studied by catalytic testing, X-ray diffraction (XRD), temperature-programmed reduction (TPR) and magnetic susceptibility measurements. Catalysts containing copper revealed an increase in the C2 hydrocarbon yield based on interactions between the copper and manganese ions within a complex oxide structure. The state of the transition-metal ions is explained by the equilibrium CuI+ MnIV⇌ CuII+ MnIII, depending on the Mn/Cu ratio and the gas-phase composition.
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