| 甲烷氧化偶联W-Mn/SiO2催化剂上O2-脉冲频率效应(PFE)的研究 |
| |
| 引用本文： | 张兵,赵军,牛建中,丑凌军,王嘉欣,李树本.甲烷氧化偶联W-Mn/SiO2催化剂上O2-脉冲频率效应(PFE)的研究[J].分子催化,2006,20(6). |
| |
| 作者姓名： | 张兵 赵军 牛建中 丑凌军 王嘉欣 李树本 |
| |
| 作者单位： | 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,甘肃,兰州,730000 |
| |
| 基金项目： | 国家重点基础研究发展计划(973计划) |
| |
| 摘 要： | 采用频率脉冲反应方法,以Mn-Na2WO4/S iO2催化剂上甲烷氧化偶联为探针反应,通过实时、原位的四极质谱检测手段,研究氧物种对甲烷C-H键选择性活化的微观历程.首次发现了Mn-Na2WO4/S iO2催化剂上O2-脉冲频率效应,即脉冲反应产物量随氧脉冲注入频率的增加而增加.研究结果表明,在反应条件下,Mn-Na2WO4/S iO2催化剂上有两种活化甲烷的氧物种同时存在,它们活化甲烷的方式不同。
|
| 关 键 词： | 甲烷氧化偶联 活性氧物种 频率脉冲实验 甲烷活化 |
A novel phenomenon of O2-Pulses Frequency Effect on Na-W-Mn/SiO2 catalyst |
| |
| ZHANG Bing,ZHAO Jun,NIU Jian-zhong,CHOU Lin-jun,WANG Jia-xin,LI Shu-ben.A novel phenomenon of O2-Pulses Frequency Effect on Na-W-Mn/SiO2 catalyst[J].Journal of Molecular Catalysis (China),2006,20(6). |
| |
| Authors: | ZHANG Bing ZHAO Jun NIU Jian-zhong CHOU Lin-jun WANG Jia-xin LI Shu-ben |
| |
| Abstract: | A phenomenon of O_2-Pulses Frequency Effect for a probe reaction of oxidative coupling of methane over Mn-Na_2WO_(4)/SiO_2 catalyst had been investigated in the real reactive conditions by the realtime measurement of quadrupole mass spectrometer.It is first found that the amount of the products in the pulse reaction was increased with increasing of the frequency of injecting pulse in the conditions.The results suggested that there are two active sites relating to activate methane to form methyl radicals with different active oxygen species on the Mn-Na_2WO_(4)/SiO_2 catalyst. |
| |
| Keywords: | O_2-Pulses Frequency Effect oxidative coupling of methane Mn-Na_2WO_4/SiO_2 catalyst active oxygen species |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《分子催化》浏览原始摘要信息 |
|
点击此处可从《分子催化》下载全文 |
|
