Factors to influence low-temperature performance of supported Mn–Na2WO4 in oxidative coupling of methane

Abstract The oxidative coupling of methane is an effective approach for directly upgrading methane to valuable products. Among known OCM catalysts, Mn–Na2WO4/SiO2 is a promising candidate for an industrial application with superior catalytic performance and high stability, where the performance of Mn–Na2WO4 significantly depends on the choice of support materials. Here, a variety of Mn–Na2WO4 catalysts were prepared using different Si-based materials as supports. The OCM performance of these catalysts was evaluated by using a high-throughput screening instrument that we had previously developed. The relationship between the catalyst performance and the choice of support materials was studied in detail on the basis of characterization using Raman spectroscopy, X-ray diffraction, elemental mapping, and X-ray photoelectron spectroscopy.