| 季生福,李树本.Na-W-Mn/SiO2催化剂活化甲烷的研究Ⅱ.活性氧物种[J].分子催化,2000,(2):107-110 |
| Na-W-Mn/SiO2催化剂活化甲烷的研究Ⅱ.活性氧物种 |
| Study on Methane Activation over Na-W-Mn/SiO2 Catalysts Ⅱ. Active Oxygen Species |
| 修订日期：1999-06-15 |
| DOI： |
| 中文关键词: 担载型催化剂 甲烷 活化 氧物种 氧化 |
| 英文关键词:Supported catalyst,Methane,Activation,Oxygen species,Desorption,Pulse reaction |
| 基金项目:国家攀登计划，95-预-36-1.1， |
| 季生福 李树本 |
| 中国科学院兰州化学物理研究所,羰基合成与选择氧化国家重点实验室,兰州,730000 |
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| 全文下载次数: 21 |
| 中文摘要: |
| 制备了不同Ｎａ、Ｗ、Ｍｎ组分的Ｎａ－Ｗ－Ｍｎ／ＳｉＯ２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／ＳｉＯ２催化剂的ＣＨ４脉冲反应（ＣＨ４－ＰＲ）。研究结果表明，Ｎａ－Ｗ－Ｍｎ／ＳｉＯ２催化剂活化甲烷的活笥氧物种是Ｗ和Ｍｎ提供的、高温下易于流动的表面晶格氧（Ｏ＾２－）。Ｎａ和Ｏ＾２－的活泼性具有重要的促进作用，它可以极化Ｗ、Ｍn的金属一氧键，促进Ｏ＾２－的流动性。Ｎａ |
| 英文摘要: |
| Na W Mn/SiO 2 catalysts containing different amounts of sodium, tungsten, and manganese were prepared and their active oxygen species for activating methane were investigated using O 2 temperature program desorption (O 2 TPD) and CH 4 pulse reaction(CH 4 PR) techniques. The experimental results indicate that the active oxygen species over Na W Mn/SiO 2 catalysts for activating methane is the mobile surface lattice oxygen (O 2- ) supplied by tungsten and manganese oxides. Sodium can strongly polarize the metal oxygen bonds of the tungsten and manganese oxides and increase the mobility of their surface lattice oxygen. There is a synergic effect of sodium, tungsten, and manganese components to activate methane with the surface lattice oxygen over Na W Mn/SiO 2 catalysts. |
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