EXAFS study of nanocrystalline CeO₂ samples prepared by sol–gel and ball-milling routes

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• 作者：Alan V. Chadwick ; Shelley L.P. Savin
• 关键词：Nanocrystals ; Ceria ; Fuel cells ; XAS ; EXAFS
• 刊名：Journal of Alloys and Compounds
• 出版年：2009
• 出版时间：20 November 2009
• 年：2009
• 卷：488
• 期：1
• 页码：1-4
• 全文大小：229 K

文摘

This paper reports a study of nanocrystalline ceria prepared by both sol–gel and ball-milling methods. EXAFS measurements show that the ball-milled samples contain a considerable fraction of amorphous material, whereas there is a high degree of order in the sol–gel samples of similar grain size. In addition, a study has been made of the effect of silica and alumina as effective additives to reduce the grain growth of nanocrystalline ceria at elevated temperatures.