MnNaW/SiO₂ oxide system based on a mesoporous silica matrix synthesized using tetraethoxysilane and cetyltrimethylammonium bromide as precursors were prepared and characterized by SEM/EDS, XRD, EPR, N₂ adsorption-desorption measurements and studied in the oxidative conversion of methane (OCM). It is shown that MnNaW/SiO₂ catalyst consists of MnO_x, Na₂WO₄, MnWO₄, and SiO₂ phases. At the reaction temperature of 750-850°C the molten Na₂WO₄ phase covers the surface of crystalline SiO₂, and the interaction of MnO_x, Na₂WO₄ and SiO₂ matrix forms “liquid glass”. It is assumed that Na_1–yMnO_x particles formed as a result of the interaction of the system components during catalyst formation and characterized by the presence of ion-radical lattice oxygen are catalytically active sites in the OCM process.

制备了以四乙氧基硅烷和十六烷基三甲基溴化铵为前驱体合成的介孔二氧化硅基体MnNaW/SiO _{2氧化物体系，并通过SEM/EDS、XRD、EPR、N 2}吸附-脱附测量对其进行了表征，并研究了甲烷氧化转化（OCM）的性能。 . 结果表明，MnNaW/SiO ₂催化剂由MnO _x、Na ₂ WO ₄、MnWO ₄和SiO ₂相组成。在 750-850°C 的反应温度下，熔融的 Na ₂ WO ₄相覆盖在结晶 SiO ₂的表面，MnO _x、Na _{2的相互作用}WO ₄和SiO ₂基体形成“液态玻璃”。假设 Na _1-y MnO _x颗粒是在催化剂形成过程中由于系统组分的相互作用而形成的，并且以离子自由基晶格氧的存在为特征，是 OCM 过程中的催化活性位点。