RT journal article
T1 Catalytic Soot Oxidation Activity of NiO–CeO2 Catalysts Prepared by a Coprecipitation Method: Influence of the Preparation pH on the Catalytic Performance
A1 Aberkane, Amar Bendieb
A1 Yeste Sigüenza, María del Pilar
A1 Fayçal, Djazi
A1 Goma Jiménez, Daniel
A1 Cauqui López, Miguel Ángel
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
K1 nickel
K1 cerium
K1 coprecipitation
K1 soot oxidation
K1 mixed oxides
AB A series of NiO–CeO2 mixed oxide catalysts have been synthesized by a modifiedcoprecipitation method at three di erent pH values (pH = 8, 9, and 10). The NiO–CeO2 mixed oxidesamples were characterized by TGA, XRD, inductively coupled plasma atomic emission spectroscopy(ICP-AES), FTIR, Brunauer–Emmett–Teller (BET) surface area, H2 temperature-programmedreduction (H2-TPR), and electron microscopy (high-angle annular dark-field transmission electronmicroscopy/energy-dispersive X-ray spectroscopy (HAADF-TEM/EDS)). The catalytic activities of thesamples for soot oxidation were investigated under loose and tight contact conditions. The catalystsexhibited a high BET surface area with average crystal sizes that varied with the pH values. Electronmicroscopy results showed the formation of small crystallites (~5 nm) of CeO2 supported on largeplate-shaped particles of NiO (~20 nm thick). XRD showed that a proportion of the Ni2+ wasincorporated into the ceria network, and it appeared that the amount on Ni2+ that replaced Ce4+ washigher when the synthesis of the mixed oxides was carried out at a lower pH. Among the synthesizedcatalysts, Ni-Ce-8 (pH = 8) exhibited the best catalytic performance.
PB MDPI
SN 1996-1944
YR 2019
FD 2019-10
LK http://hdl.handle.net/10498/22119
UL http://hdl.handle.net/10498/22119
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 15-nov-2026