English  |  正體中文  |  简体中文  |  Items with full text/Total items : 6469/11641
Visitors : 19014192      Online Users : 259
RC Version 3.2 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search
LoginUploadHelpAboutAdminister

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

Files in This Item:

There are no files associated with this item.



All items in NCUEIR are protected by copyright, with all rights reserved.

 


DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback