A Smart Hydrothermal Synthesis for Cobble-Like Porous CeO₂ and their Superior Catalytic Performance for NH₃-SCR of NO_x

Abstract:

The almost monodisperse cobble-like CeO₂ nanostructures with many pores and a diameter of 50-100 nm have been successfully synthesized by a smart hydrothermal route. XRD, SEM, XPS, BET, and in situ DRIFT were employed to characterize the samples. The results showed that the cobble-like CeO₂ owned a fluorite cubic structure and there are Ce³⁺ ions and oxygen vacancies in surface of samples. Its catalytic activity was investigated by selective catalytic reduction of NO_x with NH₃. The results showed that cobble-like CeO₂ nanostructures exhibit excellent catalytic performance, which can be attributed to the much larger surface areas, novel morphology and the best redox behaviour of surface oxygen on the CeO₂ surface.

• Periodical: Journal of Nano Research (Volume 50)
• Pages: 72-77
• DOI: https://doi.org/10.4028/www.scientific.net/JNanoR.50.72
• Online since: November 2017
• Authors: Xiao Fei Niu*, Fu Rong Tu
• Keywords: Catalytic Performance, Defects, Hydrothermal Method, Nanoparticle, Porous Structure

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