| 甲烷氧化偶联催化剂Li/MgO的结构及表面性质的研究 |
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| 引用本文： | 金永漱,颜其洁,黄庆兵,王野,陈懿.甲烷氧化偶联催化剂Li/MgO的结构及表面性质的研究[J].无机化学学报,1992,8(4):433-438. |
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| 作者姓名： | 金永漱 颜其洁 黄庆兵 王野 陈懿 |
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| 作者单位： | 南京大学现代分析中心，南京大学化学系，南京大学现代分析中心，南京大学化学系，南京大学化学系 南京 210008，南京 210008，南京 210008，南京 210008，南京 210008 |
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| 摘 要： | 本文用XRD、TEM、XPS和荧光光谱等方法研究了一组不同Li~+含量的Li/MgO催化剂的结构及表面性质,并与它们的氧化偶联甲烷的催化性能相关联。结果表明,低配位O~(2-)(O_(3c)~(2-))是使甲烷活化的活性中心。O_(1s)结合能为531.9eV的氧物种是对甲烷氧化偶联反应的C_2选择性起作用的活性氧物种。
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| 关 键 词： | 甲烷氧化偶联 催化剂 表面性质 |
| 收稿时间： | 1991/12/31 0:00:00 |
STUDY OF STRUCTURE AND SURFACE PROPERTIES OF Li/MgO CATALYSTS FOR OXIDATIVE COUPLING OF METHANE |
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| Jin Yongshu,Yan Qijie,Huang Qingbing,Wang Ye and Chen Yi.STUDY OF STRUCTURE AND SURFACE PROPERTIES OF Li/MgO CATALYSTS FOR OXIDATIVE COUPLING OF METHANE[J].Chinese Journal of Inorganic Chemistry,1992,8(4):433-438. |
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| Authors: | Jin Yongshu Yan Qijie Huang Qingbing Wang Ye and Chen Yi |
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| Institution: | Center of Materials Analysisa, Nanjing University, Nanjing 210008,Department of Chemistry, Nanjing University, Nanjing 210008,Center of Materials Analysisa, Nanjing University, Nanjing 210008,Department of Chemistry, Nanjing University, Nanjing 210008 and Department of Chemistry, Nanjing University, Nanjing 210008 |
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| Abstract: | The structure and suface properties of Li / MgO catalysts with various Li+ content for oxidative coupling of methane have been studied using XRD, XPS, TEM and
photolumincsccnce spcctroscopy in conjunction with traditional catalytic behavior measurement. A good correlation between C2 selectivity and relative intensity of surface oxygen species corresponding to an O1s XPS peak at 531.9eV has been obtained. As an increasing amount of Li+ was added, the ratios O3c2- / O4c2- increased, passing through a maximum at 10mol% Li+ and then decreasing. The variation of the ratios with Li content paralleled the conversion of CH4, suggesting O3c2- ions are the active sites responsible for methane activation. |
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| Keywords: | methane oxidative coupling Li / MgO surface XPS |
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