National Changhua University of Education Institutional Repository : Item 987654321/16854
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题名: The Role of [M+O-] Centers (M+=Group IA Ion) in the Activation of Methane on Metal Oxides
作者: Jack H. Lunsford;Lin, Chiu-Hsun;Wang, Ji-Xiang;K. D. Campbell
贡献者: 化學系
日期: 1987
上传时间: 2013-06-05T09:36:52Z
出版者: Materials Research Society
摘要: If the ionic radii are compatible, alkali metal ions will substitute for the divalent metal ions in magnesium oxide, calcium oxide and zinc oxide. At high temperatures in the presence of molecular oxygen, centers of the type [M+O−] are formed, where MM+– Group IA ion. The O− ions in equilibrium with these centers are effective in H” abstraction from CH4, which is the first step in the oxidative dimerization reaction. At reaction temperatures >720°C alkali metal oxides formed on the catalytic surface may themselves become active centers. Alkali metal carbonates also may inhibit the activity of the host oxide and sinter the oxide, thereby eliminating corner sites which result in complete oxidation.
關聯: MRS Proceedings, 111: 305
显示于类别:[化學系] 專書

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