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Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/16854

Title: The Role of [M+O-] Centers (M+=Group IA Ion) in the Activation of Methane on Metal Oxides
Authors: Jack H. Lunsford;Lin, Chiu-Hsun;Wang, Ji-Xiang;K. D. Campbell
Contributors: 化學系
Date: 1987
Issue Date: 2013-06-05T09:36:52Z
Publisher: Materials Research Society
Abstract: 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.
Relation: MRS Proceedings, 111: 305
Appears in Collections:[化學系] 專書

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