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Lattice Defects and Oxygen Storage Capacity of Nanocrystalline Ceria and Ceria-Zirconia
Abstract
The atomic structures of nanocrystalline powders of ceria, CeO 2, and ceria-zirconia solid solution, (Ce,Zr)O 2, were studied by the pulsed neutron diffraction technique. Ceria is used as an oxygen storage component in automotive exhaust emission control systems, but the degradation of its oxygen storage capacity (OSC) after extended use at high temperatures has been a problem. Our results for the first time establish a direct correlation between the concentration of vacancy-interstitial oxygen defects and OSC. The surface area, on the other hand, exhibits much less correlation with OSC. The results also show that zirconia, which is known to retard the degradation when incorporated into ceria, reduces ceria and preserves oxygen defects. It is suggested that oxygen defects are the source of OSC in ceria-based catalyst supports, and the preservation of oxygen defects is critical for the stability of OSC against thermal aging.
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Citations
Cited by
Fundamentals and Catalytic Applications of CeO 2 -Based Materials
Montini, T., Melchionna, M., Monai, M., & Fornasiero, P. (2016) · Chemical Reviews · doi:10.1021/acs.chemrev.5b00603 · Cited by 2,766
Review of iron-free Fenton-like systems for activating H2O2 in advanced oxidation processes
Bokare, A. D., & Choi, W. (2014) · Journal of Hazardous Materials · doi:10.1016/j.jhazmat.2014.04.054 · Cited by 2,368
Djinović, P., Osojnik Črnivec, I. G., Erjavec, B., & Pintar, A. (2012) · Applied Catalysis B: Environmental · doi:10.1016/j.apcatb.2012.05.049 · Cited by 337
Akbayrak, S., Tonbul, Y., & Özkar, S. (2017) · Applied Catalysis B: Environmental · doi:10.1016/j.apcatb.2017.01.063 · Cited by 134
Metadata
- Authors
- Mamontov, E., Egami, T., Brezny, R., Koranne, M., & Tyagi, S.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2000-10-27
- Volume
- 104
- Issue
- 47
- Pages
- 11110-11116
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2079095846
- Cited by
- 569
- References
- 0
- FWCI
- 9.06
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Lattice Defects and Oxygen Storage Capacity of Nanocrystalline Ceria and Ceria-Zirconia. https://app.cochat.ai/papers/10.1021/jp0023011
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- Mamontov, E., Egami, T., Brezny, R., Koranne, M., & Tyagi, S. (2000). Lattice Defects and Oxygen Storage Capacity of Nanocrystalline Ceria and Ceria-Zirconia. The Journal of Physical Chemistry B. https://doi.org/10.1021/jp0023011
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