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Journal of Materials Science
Published in: Journal of Materials Science 10/2017

30-01-2017 | Original Paper

Remarkably promoted low-temperature reducibility and thermal stability of CeO2–ZrO2–La2O3–Nd2O3 by a urea-assisted low-temperature (90 °C) hydrothermal procedure

Authors: Yi Zhou, Jie Deng, Li Lan, Jianli Wang, Shandong Yuan, Maochu Gong, Yaoqiang Chen

Published in: Journal of Materials Science | Issue 10/2017

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Abstract

Conventional co-precipitation combined with a urea-assisted low-temperature (90 °C) hydrothermal procedure (CZU) and the same method without urea (CZ) were used to prepare material CeO2–ZrO2–La2O3–Nd2O3. X-ray diffraction, Raman, nitrogen adsorption–desorption, transmission electron microscope, hydrogen-temperature programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy were employed to study the structural, textural, reduction behavior and surface elemental composition of the materials. The results reveal that, compared to CZ, CZU exhibits more outstanding structural property, higher thermal stability and higher low-temperature reducibility. The results also show that the stability of the reduction behavior is closely related to its surface chemical properties, especially the variation of the surface atomic ratio of Ce/Zr and the surface oxygen species. The possible mechanism of urea was also discussed in this study. In addition, with regard to corresponding Pd-only three-way catalysts, remarkably boosted catalytic performance of Pd/CZU is also obtained than that of Pd/CZ, and which suggests that CZU holds better prospective applications.
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Appendix
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Metadata
Title
Remarkably promoted low-temperature reducibility and thermal stability of CeO2–ZrO2–La2O3–Nd2O3 by a urea-assisted low-temperature (90 °C) hydrothermal procedure
Authors
Yi Zhou
Jie Deng
Li Lan
Jianli Wang
Shandong Yuan
Maochu Gong
Yaoqiang Chen
Publication date
30-01-2017
Publisher
Springer US
Published in
Journal of Materials Science / Issue 10/2017
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-017-0825-z

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