Ceria in Catalysis: From Automotive Applications to the Water Gas Shift Reaction
Ceria in Catalysis: From Automotive Applications to the Water Gas Shift Reaction
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DOI：
10.1002/aic.12234
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发表时间：
2010-05-01
期刊：
影响因子：
3.7
通讯作者：
Gorte, Raymond J.
中科院分区：
文献类型：
--
作者：
Gorte, Raymond J.
二氧化铈是汽车催化剂的重要组成部分，其还原和再氧化的能力提供了储氧能力。由于这些氧化还原性质，当氧化铈用作过渡金属的载体时，它可以大大提高许多重要反应的催化活性。对于使用蒸汽作为氧化剂的反应（例如，水煤气变换反应和烃的蒸汽重整），二氧化铈负载的金属的速率可以比单独的二氧化铈或过渡金属的速率高几个数量级。由于二氧化铈的氧化还原性质强烈依赖于处理历史和添加剂的存在，因此存在对基于切拉的催化剂进行改性以进一步改善其性能的重要机会。本文将回顾我的实验室在理解和使用氧化铈在这些应用方面的一些贡献。(C)2010美国化学工程师学会AIChE J，56：1126-1135，2010
Ceria is a crucial component of automotive catalysts, where its ability to be reduced and re-oxidized provides oxygen storage capacity. Because of these redox properties, ceria can greatly enhance catalytic activities for a number of important reactions when it is used as a support for transition metals. For reactions that use steam as an oxidant (e.g., the water-gas-shift reaction and steam reforming of hydrocarbons), rates for ceria-supported metals can be several orders of magnitude higher than that for ceria or the transition metal alone. Because the redox properties of ceria are strongly dependent on treatment history and the presence of additives, there are significant opportunities for modifying catalysts based on cella to further improve their performance. This article will review some of the contributions from my laboratory on understanding and using ceria in these applications. (C) 2010 American Institute of Chemical Engineers AIChE J, 56: 1126-1135, 2010