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HomeKey Engineering MaterialsKey Engineering Materials Vol. 633Synthesis and Characterization of Ce0.5Zr0.5O2...

Synthesis and Characterization of Ce_0.5Zr_0.5O₂ Nanocomposite and its Supported Pd-Only Catalysis Activity

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Abstract:

The Ce_0.5Zr_0.5O₂ nanocomposites (CZ) were prepared by co-precipitation(CP), fractional precipitation (FP) and fractional precipitation with hydrothermal treatment (FP-HT). The samples were characterized by X-ray diffraction (XRD), Brunauer-Emmet Teller method (BET), H₂-temperature programmed reduction (H₂-TPR), and thermogravimetric analysis (TG) under H₂-N₂. XRD results displayed that all samples formed a single solid solution-like ceria-zirconia phase. BET results revealed CZ prepared by FP-HT (CZ-FP-HT) had the highest surface area. H₂-TPR and TG analysis under H₂-N₂ showed CZ-FP-HT exhibited the strongest redox ability and oxygen storage capacity. Moreover, three-way catalysts of Pd-Rh supported on CZ -FP-HT and commercial CZ with same composites were prepared, and their three-way catalytic activity were also studied by engine evaluation. Pd-Rh/CZ-FP-HT showed a bit of higher oxygen storage capacity, catalytic activity and better thermal stability than Pd-Rh/CZ-commercial.

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Periodical:

Key Engineering Materials (Volume 633)

Pages:

77-81

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.633.77

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Online since:

November 2014

Authors:

Dong Xia Yang, Ping Ning, Jie Li He, Jing Fang Zhu, Ting Ting Zheng, Yuan Feng Huan

Keywords:

Catalytic Activity, Ce_0.5Zr_0.5O₂ Nanocomposite, Co-Precipitation, Fractional Precipitation, Hydrothermal Treatment

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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