制备了不同 Na、W、Mn组分的 Na- W- Mn/ Si O2 催化剂 ,并进行了 O2 程序升温脱附 (O2 - TPD)和不同温度下 Na- W- Mn/ Si O2 催化剂的 CH4脉冲反应 (CH4- PR) .研究结果表明 ,Na- W- Mn/ Si O2 催化剂活化甲烷的活性氧物种是 W和 Mn提供的、高温下易于流动的表面晶格氧 (O2 - ) . Na对 O2 - 的活泼性具有重要的促进作用 ,它可以极化 W、 Mn的金属—氧键 ,促进 O2 - 的流动性 . Na、 W、 Mn共存在时 ,对 O2 - 活化甲烷有协同作用 The Na - W - Mn / Si O2 catalysts with different Na, W and Mn contents were prepared and characterized by O2 temperature programmed desorption (O2 - TPD) and CH4 pulse (CH4-PR) .The results show that the activated oxygen species activated by Na-W-Mn / Si O2 catalyst are the surface lattice oxygen (O2-) which is provided by W and Mn and flows easily at high temperature. - has an important role in promoting the activity, which can polarize the metal-oxygen bonds of W and Mn and promote the flowability of O2 - Synergistic effect on O2 - activated methane when Na, W and Mn coexist