Solvothermal synthesis and characterization of ceria-zirconia mixed oxides for catalytic applications

M. K. Devaraju; Xiangwen Liu; Kikuchi Yusuke; S. Yin; T. Sato

doi:10.1088/0957-4484/20/40/405606

Solvothermal synthesis and characterization of ceria-zirconia mixed oxides for catalytic applications

M. K. Devaraju, Xiangwen Liu, Kikuchi Yusuke, S. Yin, T. Sato

Division of Inorganic Material Research

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

Solvothermal synthesis under supercritical conditions (400 °C) and high autogenous pressure (about 40MPa), has been carried out for the direct preparation of nanocrystalline powders of CeO₂, Ce _0.85Zr_0.15O₂, Ce_0.75Zr _0.25O₂, Ce_0.65Zr_0.35O₂ and Ce_0.5Zr_0.5O₂ which are characterized for applications as catalysts for oxygen storage in automotive catalysis. The synthesis was carried out in the presence of polyethylene glycol and water. For the characterization, x-ray diffraction (XRD), transmission electron microscopy (TEM), dynamic light scattering (DLS) and the Brunauer-Emmet-Teller (BET) technique were employed. The oxygen storage capacity (OSC) of as-prepared and calcined samples without loading of noble metals was measured using thermogravimetric-differential thermal analysis(TG-DTA) at 600 °C with a continuous flow of CO-N₂ gas and air alternately. Ce _0.5Zr_0.5O₂ nanoparticles with a BET surface area of 102m²g^-1 exhibited the highest OSC of 0.073 50mol-O₂/mol-CeO₂. The OSC values obtained increased with increasing the amount of ZrO₂ doping in the samples.

Original language	English
Article number	405606
Journal	Nanotechnology
Volume	20
Issue number	40
DOIs	https://doi.org/10.1088/0957-4484/20/40/405606
Publication status	Published - 2009

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Materials Science(all)
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

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abstract = "Solvothermal synthesis under supercritical conditions (400 °C) and high autogenous pressure (about 40MPa), has been carried out for the direct preparation of nanocrystalline powders of CeO2, Ce 0.85Zr0.15O2, Ce0.75Zr 0.25O2, Ce0.65Zr0.35O2 and Ce0.5Zr0.5O2 which are characterized for applications as catalysts for oxygen storage in automotive catalysis. The synthesis was carried out in the presence of polyethylene glycol and water. For the characterization, x-ray diffraction (XRD), transmission electron microscopy (TEM), dynamic light scattering (DLS) and the Brunauer-Emmet-Teller (BET) technique were employed. The oxygen storage capacity (OSC) of as-prepared and calcined samples without loading of noble metals was measured using thermogravimetric-differential thermal analysis(TG-DTA) at 600 °C with a continuous flow of CO-N2 gas and air alternately. Ce 0.5Zr0.5O2 nanoparticles with a BET surface area of 102m2g-1 exhibited the highest OSC of 0.073 50mol-O2/mol-CeO2. The OSC values obtained increased with increasing the amount of ZrO2 doping in the samples.",

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AU - Yusuke, Kikuchi

AU - Yin, S.

AU - Sato, T.

PY - 2009

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Solvothermal synthesis and characterization of ceria-zirconia mixed oxides for catalytic applications

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