Preparation and Comparison of M/Ce-K-O (M=Co, Ni, Cu) Nanocomposites on Catalytic Soot Combustion

Abstract:

Porous nanocomposites of M/Ce-K-O (M=Co, Ni, Cu) were prepared by the citrate-gel thermal decomposition and selective reduction process, and the effect of transition metal nanoparticles on their microstructure, catalytic performance were studied by XRD, SEM, BET, XPS and TG analysis. The nanocomposites consist of the fluorite-type matrix of CeO2 nanoparticles about 13-20 nm and metallic nanoparticles ~26 nm. These nanocomposites have a nanoporous structure with high specific surface area and their pore sizes, pore structures, surface morphologies are largely affected by the dispersed nano metal species. For M/Ce-K-O (M=Co, Ni, Cu) nanocomposites, all the catalysts show a high catalytic activity for soot combustion, and among them, the Cu/Ce-K-O nanocomposite has a lowest T50 of 315 °C mainly due to a higher lattice oxygen content and a weaker Cu-O interaction intensity.

• Periodical: Advanced Materials Research (Volume 699)
• Pages: 150-154
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.699.150
• Online since: May 2013
• Authors: Feng Lin He, Mao Xiang Jing, Xiao Xiao Meng, Xiang Qian Shen
• Keywords: CeO₂, Nanocomposite, Soot Combustion, Transition Metal

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