Study on physico-chemical properties of tin dioxide based gas sensitive materials used in condensation reactions of n-butanol

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• 作者：Teterycz ; Helena ; Klimkiewicz ; Roman ; Laniecki ; Marek
• 关键词：Tin dioxide ; Cerium dioxide ; Rhodium ; Ketonization ; Lewis acidic centers ; Oxygen vacancy
• 刊名：Applied Catalysis A: General
• 出版年：2004
• 出版时间：October 28, 2004
• 年：2004
• 卷：274
• 期：1-2
• 页码：49-60
• 全文大小：406 K

文摘

The physico-chemical properties of primary alcohol conversion catalysts SnO₂, CeO₂ and tin dioxide modified with rhodium, cerium or both, are presented. The synthesis of pure SnO₂ was performed with the Okazaky method. Admixturing with rhodium was made by the impregnation method. Addition of cerium was achieved by co-precipitation. The obtained materials based on tin dioxide were monophase materials of tetragonal structure, characteristic for SnO₂. As a result of introducing cerium as a dopant of tin oxide(IV), the character of active centers was changed. The obtained monophase materials of compositions Sn_0.93Ce_0.07O and Sn_0.925Ce_0.07Rh_0.005O₂ revealed a large number of strong Lewis acidic centers on the surface. As a result of the addition of CeO₂ to basic tin dioxide there was a clear modification of catalytic properties appearing in these materials.