CeO₂–ZrO₂–Al₂O₃ Ternary Oxides Synthesized via Supercritical Anti-Solvent and as a Support for Pd Catalyst for CO Oxidation

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• 作者：Haoxi Jiang ; Xiaohui Wu ; Caixia Wang ; Pan Huang ; Yonghui Li…
• 关键词：Supercritical anti ; solvent (SAS) ; CeO2–ZrO2–Al2O3 ; Oxygen storage capacity (OSC) ; CO oxidation ; Pd catalyst
• 刊名：Catalysis Surveys from Asia
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：21
• 期：1
• 页码：37-44
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Catalysis; Physical Chemistry; Industrial Chemistry/Chemical Engineering; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1574-9266
• 卷排序：21

文摘

CeO₂–ZrO₂–Al₂O₃ ternary oxides as a support for CO oxidation was synthesized successfully via supercritical anti-solvent (SAS) precipitation using CO₂ as the anti-solvent and methanol as the solvent. It was found that the CeO₂–ZrO₂–Al₂O₃ fabricated by SAS precipitation (CZA1) had superior resistance to sintering compared to the traditional co-precipitation method (CZA2). Meanwhile, the oxygen storage/release rate of CAZ1 was almost 1.5 times higher than that of CZA2 and the total oxygen storage capacity (OSC) of CAZ1 was almost twice as high as CZA2. The interactions between the Pd and the CeO₂–ZrO₂–Al₂O₃ support were stronger for the support synthesized by SAS precipitation. The conversion of CO oxidation of Pd/CZA1 was even better than that of Pd/CZA2, especially at high GHSV.