Rapid hydrothermal synthesis of CeO2 nanoparticles with (220)-dominated surface and its CO catalytic performance

Abstract Uniform CeO 2 nanoparticles with diameter in the range of 13–17 nm were synthesized through a one-step rapid hydrothermal strategy. The characterization indicated that (2 2 0) surface is the majority of the exposed CeO 2 surfaces. The reaction conditions including reactant amounts, reaction time were studied and optimized. The addition of hexamethylenetetramine is the key to the formation of (2 2 0)-dominated surface structure. The product shows better catalytic performance on CO conversion corresponding to the result of temperature-programmed reduction under a H 2 environment.