MIXED OXIDES CATALYSTS FOR OXIDATIVE COUPLING OF METHANE

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An oxidative coupling of methane (OCM) catalyst composition characterized by the general formula (EaDbOx)-Mn/Na2WO4; wherein E is a first rare earth element; wherein D is a second rare earth element; wherein the first rare earth element and the second rare earth element are different; wherein a is 1.0; wherein b is from about 0 to about 10.0; wherein when b is 0, the first rare earth element is not lanthanum (La) alone or cerium (Ce) alone; and wherein x balances the oxidation states.