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Journal of Nanoparticle Research

, Volume 13, Issue 12, pp 7021–7028 | Cite as

Control of morphology and dopant distribution in yttrium-doped ceria nanoparticles

  • Shao-Ju Shih
  • Ying-Ying Wu
  • Konstantin B. Borisenko
Research Paper

Abstract

The morphology and distribution of dopant in yttrium-doped ceria (YDC) nanoparticles prepared by spray pyrolysis were characterised by transmission electron microscopy and X-ray energy dispersive spectroscopy (XEDS), respectively. By combining the XEDS analysis and concentration distribution modelling, accurate yttrium dopant concentration variation from the particle center to the surface can be determined. It is shown that by appropriately selecting cerium precursors, the yttrium dopant distribution in YDC nanoparticles can be controlled. Uniform yttrium distribution in the YDC particles has been achieved, which is important to decrease probability of yttrium cluster segregation to improve oxygen ion conductivity in solid oxide fuel cell electrolytes. This control is based on the suggested mechanism of dopant distribution which proposes that hydration energies influence diffusion rates of the precursors during preparation process. In addition, the morphology (solid spherical, hollow spherical and hollow concave) formation mechanisms of the YDC particles from different cerium precursors are discussed.

Keywords

Solid oxide fuel cell Yttrium-doped ceria Nanoparticles Transmission electron microscopy X-ray energy dispersive spectroscopy Electrolytes 

Notes

Acknowledgments

This work was partially funded by the National Science Council of Taiwan (Grant No. NSC 99-2218-E-011-030-MY2). The authors thank Prof. Chin-Yi Chen (Feng Chia University, Taiwan) for the YDC samples.

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Shao-Ju Shih
    • 1
  • Ying-Ying Wu
    • 1
  • Konstantin B. Borisenko
    • 2
  1. 1.Department of Materials Science and EngineeringNational Taiwan University of Science and TechnologyTaipei 106Taiwan
  2. 2.Department of MaterialsUniversity of OxfordOxfordUK

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