Nanometric Colloidal Sols of CeO₂-ZrO₂ Solid Solution as Catalyst Modifiers(1)Preparation and Structure
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<jats:title>Abstract</jats:title> <jats:p>Stable nanometric colloidal sols consisting of fluorite-type metal oxides were prepared for use as chloride-free precursors for automotive catalysts. The aqueous solution containing metal carbonates and tetramethylammonium (TMA) ions was degassed and hydrothermally treated at 140–160 °C. Colloidal suspensions thus formed were purified by ultrafiltration to yield very stable and condensed sol solutions of CeO2 (CE), ZrO2 (ZR) and their solid solutions, CeO2–ZrO2 (CZ), which were stabilized by TMA. Each oxide sol contained 6–8 nm primary particles, but they formed aggregates larger than 40 nm. Local structural analysis by means of XAFS suggested that CZ sol exhibited two types of solid solution domains containing more or less Ce. The dried CZ sol exhibited higher thermal stability and oxygen storage capacity than CE and ZR sols.</jats:p>
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- Bulletin of the Chemical Society of Japan
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Bulletin of the Chemical Society of Japan 86 (10), 1210-1215, 2013-10
Tokyo : Chemical Society of Japan
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詳細情報 詳細情報について
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- CRID
- 1522825129650034432
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- NII論文ID
- 10031201279
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- NII書誌ID
- AA00580132
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- ISSN
- 00092673
- 13480634
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- NDL書誌ID
- 024925364
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- 本文言語コード
- en
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- NDL 雑誌分類
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- ZP1(科学技術--化学・化学工業)
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- データソース種別
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- NDL
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