The oxidative coupling of methane using silica-supported Na₂WO₄ (Na₂WO₄/SiO₂) catalysts is observed by adjusting additives in order to understand the roles of additives and to design more efficient catalysts. By observing the effects of additives on the catalytic OCM activity of Na₂WO₄/SiO₂ catalysts, the reducibility of metal additives, quantified by the standard reduction potentials, is observed to improve the methane conversion and olefin selectivity, indicating that the active sites of activating methane and dehydrogenating paraffin are identical. The supply of oxygen atoms from more easily reducible additives to tungsten oxide manipulate the OCM activity as described by the standard reduction potentials of the additives. The crystal and electronic structures of the catalysts depend on the additives, which can also be used to adjust the catalytic activity.

为了理解添加剂的作用并设计更有效的催化剂，通过调节添加剂观察到了使用二氧化硅负载的Na ₂ WO ₄（Na ₂ WO ₄ / SiO ₂）催化剂对甲烷的氧化偶联作用。通过观察添加剂对Na ₂ WO ₄ / SiO ₂催化OCM活性的影响在催化剂中，观察到金属添加剂的还原性（通过标准还原电位进行定量）可提高甲烷转化率和烯烃选择性，表明活化甲烷和脱氢石蜡的活性中心相同。从更易还原的添加剂向氧化钨的氧原子供应可控制OCM活性，如添加剂的标准还原电势所述。催化剂的晶体和电子结构取决于添加剂，这些添加剂也可用于调节催化活性。