A rationale for the development of thermally stable nanostructured CeO_2-ZrO_2-containing mixed oxides

作     者：Roberta Di Monte Jan Kapar Heather Bradshaw Colin Norman 

作者机构：Department of Chemistry Sciences Interuniversity Consortium INCA University of Trieste Via L.Giorgieri34127 Trieste Italy MEL Chemicals P.O. Box 6 Clifton Junction SwintonManchester M27 8LS England 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2008年第26卷第2期

页      面：136-140页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：PRIN 2006  "Caratterizzazione spettroscopica e morfologica di Me-POSS eterogeneizzati"  MEL Chemicals 

主　　题：CeO2-ZrO2 mixed oxides CeO2-ZrO2 solid solution CeO2-ZrO2 mixed oxides, thermal stability of three-way catalysts oxygen storage capacity rare earths 

摘      要：CeO2-ZeO2 solid solutions are extensively used as oxygen storage promoters in the current automotive three-way catalysts. High thermal stability of the textural properties is one of the most important requirements for practical application since temperatures up to 1273 K are easily experienced by these materials under real working conditions. In the present paper, we investigated how hydrothermal treatments applied to cakes of doped and undoped ZrO2-rich CeO2-ZrO2 precursors might improve the thermal stability of the final CeO2-ZrO2 solid solution. A rationale was developed that allowed to correlate the morphology of the hydrothermaUy treated cake with the thermal stability at 1273 K of the final product, which did not depend on the composition of the mixed oxides.