Naslov
Hydrothermally derived copper-doped ceria nanocatalyst

Autori
Mužina, Katarina ; Guliš, Martina ; Kurajica, Stanislav

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Solid-State Science & Research - Book of Abstracts / Juribašić Kulcsar, Marina ; Halasz, Ivan - Zagreb : Institut Ruđer Bošković, 2017, 63-63

ISBN
978-953-7941-15-4

Skup
Solid-State Science & Research

Mjesto i datum
Zagreb, Hrvatska, 28.06.2017. - 30.06.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
hydrothermal synthesis ; nanomaterials ; doped ceria

Sažetak
Catalytic oxidation of carbon monoxide (CO) is a process of utmost importance for environmental protection in transportation and industry. Due to reversible oxygen storage and release capacity, ceria (CeO2) has been considered a useful catalyst for this process. If prepared in nanosized form, ceria shows increased catalytic activity owing to the increased specific surface area, but exhibits poor low-temperature catalytic activity and thermal stability. Therefore, various transition metals are doped into CeO2 crystal lattice to improve its properties. Incorporation of copper into the ceria crystal lattice yields with a synergic effect between the ionic couples of Cu+/Cu2+ and Ce3+/Ce4+, thus increasing the oxygen storage capacity and ionic conductivity. Recently, we managed to optimize the nanoceria hydrothermal synthesis procedure using Ce(SO4)2x4H2O and NaOH and attest its favorable catalytic properties [1, 2]. Herein, we report on hydrothermal synthesis of pure (CeO2) and copper-doped (Ce1- XCuXO2-X, x=0.1) ceria nanoparticles. The prepared nanoparticles were characterized in detail using X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), Fourier- transformed infra-red spectroscopy (FTIR) and adsorption-desorption N2 isotherms. The XRD results showed phase purity of the prepared ceria and the application of the Scherrer method revealed that the crystallite size is below 10 nm. Approximately the same particle size could be estimated on the basis of TEM micrograph. Small particle size resulted in high specific surface area of the prepared nanoparticles. The obtained results encourage us to widen our investigation to ceria catalytic performance and potential catalytic applications.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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