Insights into the redox properties of ceria-based oxides and their implications in catalysis
Insights into the redox properties of ceria-based oxides and their implications in catalysis
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DOI：
10.1016/j.jallcom.2004.12.113
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发表时间：
2006-02-09
影响因子：
6.2
通讯作者：
Trovarelli, A
中科院分区：
文献类型：
--
作者：
Aneggi, E;Boaro, M;Trovarelli, A
在目前的工作中，氧化还原物性和相关材料将被考虑，重点放在这些与催化相关的影响上。特别是，在简要地指出了CeO2在经典TWC应用中的相关氧化还原化学和表征之后，我们将描述CeO2的还原/氧化特性如何在其他应用中有所帮助，例如开发用于汽车尾气处理的先进的CeO2-锆基催化剂，以及消除柴油发动机排气中的碳烟。在第一个例子中，考察了不同的氧化铈和氧化锆催化剂配方，以了解催化活性与组成的关系，并导出了一个简单的CO氧化氧化还原机理模型。一种类似的方法也被用来表征CeO2在煤烟燃烧中的作用。(C)2005 Elsevier B.V.保留所有权利。
In the present work, the redox properties of ceria and related materials will be considered with a focus on these effects that are relevant in catalysis. Particularly, after briefly pointing out the relevant redox chemistry and characterization of ceria in classical TWC application, we will describe how the reduction/oxidation characteristics of ceria are of help in other applications, like the development of advanced ceria-zirconia based catalyst for auto exhaust treatment, and the elimination of soot from diesel engine exhaust. In the first example, different catalyst formulations based on ceria and zirconia are examined to see how catalytic activity is related with composition and a simple redox mechanism model for CO oxidation is also derived. A similar approach is used to characterize the role of ceria in the combustion of soot. (c) 2005 Elsevier B.V. All rights reserved.