Colloidal Solution Combustion Synthesis: Toward Mass Production of a Crystalline Uniform Mesoporous CeO2 Catalyst with Tunable Porosity

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• 作者：Albert A. Voskanyan ; Kwong-Yu Chan ; Chi-Ying Vanessa Li
• 刊名：Chemistry of Materials
• 出版年：2016
• 出版时间：April 26, 2016
• 年：2016
• 卷：28
• 期：8
• 页码：2768-2775
• 全文大小：599K
• 年卷期：0
• ISSN：1520-5002

文摘

Mesoporous metal oxides with uniform porosity are of considerable interest. Their economical production on a large scale in an efficient manner, however, remains a challenging task for commercialization. In this work, we demonstrate for the first time a scalable, economic, energy and time efficient method for the synthesis of a crystalline mesoporous CeO₂ catalyst with tailored porosity, by utilizing colloidal SiO₂ as a template. The size and amount of colloidal particles can tune the porosity of the CeO₂ nanostructure as well as alter the heat transfer and heat balance of combustion. As-prepared CeO₂ possesses uniform 22 nm pores and a 0.6 mL/g pore volume, which is the largest pore volume for CeO₂ reported. The obtained mesoporous CeO₂ catalyst exhibited excellent activity for soot and carbon monoxide oxidation. In principle, this method can be applied to synthesize different high-porosity crystalline oxides, and mesoporous CuO was also successfully prepared, thus demonstrating the generality of the method.