The Mn₂O₃-Na₂WO₄/SiO₂ catalyst is the most promising one among the enormous catalysts for the oxidative coupling of methane (OCM) but only at above 800 °C. No doubt that lowering temperature of the OCM process is at the forefront of this catalysis field. A promising low-temperature active and selective TiO₂-doped Mn₂O₃ Na₂WO₄/SiO₂ catalyst, consisting of 6 wt% TiO₂, 6 wt% Mn₂O₃, 10 wt% Na₂WO₄ and SiO₂ in balance, is developed by solution combustion synthesis (SCS) method. This catalyst is capable of converting 20% CH₄ with 70% selectivity to C₂-C₃ hydrocarbons even at 700 °C (catalyst bed temperature) and is stable for at least 250 h without deactivation sign, for a feed gas of 50% CH₄ in air using a gas hourly space velocity of 8000 mL g_cat.⁻¹ h⁻¹. In contrast, the non-TiO₂-doped SCS catalyst is almost inactive at 700 °C whereas it can achieve reactivity (∼24% CH₄ conversion and ∼74% C₂-C₃ selectivity) comparable to the TiO₂-doped one at 800 °C. XRD and Raman results evidently reveal that the formation of MnTiO₃ during the OCM process appears to be important for the low-temperature OCM activity improvement by TiO₂-doping.

Mn ₂ O ₃ -Na ₂ WO ₄ / SiO ₂催化剂是甲烷（OCM）氧化偶联的巨大催化剂中最有前途的一种，但仅在800°C以上。毫无疑问，降低OCM工艺的温度是该催化领域的最前沿。一个有希望的低温活性和选择性的TiO ₂掺杂的Mn ₂ ö ₃的Na ₂ WO ₄ /二氧化硅₂催化剂，包括6重量％的TiO ₂，6重量％的Mn ₂ ö ₃，10重量％的Na ₂ WO ₄和SiO _2个平衡，是通过固溶燃烧合成（SCS）方法开发的。即使在700°C（催化剂床温）下，该催化剂也能够将20％CH ₄转化为C ₂ -C ₃烃，选择性为70％，并且对于50％的进料气，至少可稳定250h无失活迹象。使用8000 mL g _cat的时空速度的空气中CH _{4 。}^-1 小时^-1。与此相反，非的TiO ₂掺杂的SCS催化剂是在700℃，而它可以实现反应性（~24％CH几乎无活性的₄转化率和~74％C ₂ -C ₃的选择性）媲美的TiO ₂-在800°C时掺杂一个。XRD和拉曼结果明显表明，在OCM工艺过程中MnTiO ₃的形成对于通过掺杂TiO ₂改善低温OCM活性很重要。