Low-temperature oxidative coupling of methane over LaCeZr ternary oxide supported Mn–Na2WO4

Abstract

Engineering Mn–Na₂WO₄ catalysts for efficient oxidative coupling of methane (OCM) at low temperatures (T ≤ 700 °C) is appealing yet challenging. Herein, we report a LaCeZr ternary oxide supported Mn–Na₂WO₄ catalyst, which achieves 20.9% C₂ yield at 700 °C with at least 50 hour stability. Characterizations suggest that LaCeZr ternary oxides can promote the redox properties of Mn–Na₂WO₄ catalysts, which facilitate O₂ activation at low reaction temperatures and generate more active oxygen species to activate CH₄ into C₂ products.