Modified-EISA synthesis of mesoporous high surface area CeO2 and catalytic property for CO oxidation

Abstract Mesoporous CeO 2 particles with high surface area were synthesized using a modified evaporation-induced self assembly(EISA) method which combined citric acid as complexing agent. As-prepared powder and further thermal treatment samples were characterized by X-ray diffraction(XRD), transmission electron microscopy(TEM), selected area electron diffraction(SAED), Fourier transform infrared spectrometer(FTIR), thermogravimetry and differential thermal analysis(TG-DTA), Brunauer-Emmett-Teller(BET) and Barrett-Joyner-Halenda (BJH) method. It was found that the cerium oxide/surfactant mixture gave rise to pure and fluorite-structured CeO 2 after calcination at 573 K. Moreover, the textural analysis revealed high specific surface area (205 m 2 /g) and mesoporous structure of the sample. The catalytic performances of mesoporous CeO 2 heated at different temperatures for CO oxidation were examined. The catalytic tests exhibited that the product had enhanced catalytic efficiency compared with the decomposed ceria.