Catalytic oxidation of CO over CuO/CeO2nanocomposites synthesized via solution combustion method: effect of fuels
Source abstract
Abstract
Abstract A series of CuO/CeO2catalysts were successfully synthesized via solution combustion method (SCS) using different fuels and tested for CO oxidation. The catalysts were characterized by energy-dispersive X-ray analysis (EDXA), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), N2adsorption-desorption isotherms and H2temperature-programmed reduction (H2-TPR). It was found that the used fuels strongly affected the characterization and the low-temperature reduction behavior of CuO/CeO2catalysts. The CuO/CeO2-urea catalyst exhibited higher catalytic activity toward CO oxidation (t50=120∘C,t100=159∘C) than the 5 other synthesized catalysts. In addition, the CuO/CeO2-urea catalyst displayed high stability for CO oxidation during five cycles and water resistance. The enhanced catalytic CO oxidation of the synthesized samples can be attributed by a combination of factors, such as smaller crystallite size, higher specific surface area, larger amount of amorphous copper(II) oxide, more mesoporous and uniform spherical-like structure. These findings are worth considering in order to continue the study of the CuO/CeO2catalyst with low-temperature CO oxidation.
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OpenAlex topics: Catalytic Processes in Materials Science · Copper-based nanomaterials and applications · Nanomaterials for catalytic reactions
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Affiliations
Saint-Petersburg State Institute of Technology (Technical University) , Moskovsky prospect 26, Saint-Petersburg , 190013, Russia
Ioffe Institute , Politekhnicheskaya Ulitsa 26, Saint-Petersburg , 194021, Russia
References (43)
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