(317d) Colloidal Solution Combustion Synthesis of Crystalline Mesoporous CeO2 Catalyst with Tunable Porosity

Mesoporous metal oxides with uniform porosity are of considerable interest. 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 adjustable porosity, by utilizing colloidal SiO₂ as a template. The size and amount of colloidal particles can tune the

porosity of the CeO₂ nanostructure and alter the heat transfer and energy balance of combustion. The CeO₂ prepared by colloidal solution combustion synthesis (CSCS) possesses uniform 22 nm pores and a 0.6 mL/g pore volume, which is among largest pore volume for CeO₂ reported in literature. The obtained mesoporous CeO₂ catalyst exhibited excellent activity for soot and carbon monoxide oxidation. In principle, the CSCS method can be applied to synthesize different high-porosity crystalline oxides. Results will also be shown for CSCS prepared mesoporous CuO.

[1] A. A. Voskanyan, K.-Y. Chan, and C.-Y. V. Li, Chem. Mater. 2016 DOI:0.1021/acs.chemmater.6b00505