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Synthesis and characterization of copper doped ceria nanocatalyst

Ceria (CeO2) has been widely applied as a viable alternative to expensive noble metal catalysts. Its beneficial properties include low price, good poisoning resistance, and high catalytic activity due to the facile Ce4+ / Ce3+ redox reaction, high oxygen mobility and oxygen storage capacity within the crystal lattice. Modern day catalyst design is focused on the preparation of nanoscale catalysts, which possess significantly improved properties in comparison to bulk materials. Incorporation of metal ions, such as transition metals, into the ceria crystal lattice can further improve catalytic properties of the prepared nanocatalyst.[1] In this work, pure and 10, 20, 30 and 40 mol. % copper doped nanocrystalline ceria was prepared via hydrothermal method. Samples were analyzed by X- ray diffraction analysis (XRD), transmission electron microscopy (TEM), N2 gas adsorption- desorption isotherms and energy dispersive X-ray spectroscopy (EDS). Catalytic activity of the prepared nanocatalysts was determined on the basis of toluene oxidation process. It was established that the addition of copper enhances the catalytic activity of nanocrystalline ceria.

ceria ; doping ; copper ; nanocatalyst

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