AI Article Synopsis
- CeO samples were made using the polymeric precursor method with varying calcination temperatures, leading to changes in particle size and shape.
- Advanced techniques like positron annihilation lifetime spectroscopy (PALS) and electron paramagnetic resonance (EPR) revealed the presence of different types of oxygen vacancies associated with various cerium ions.
- Impedance spectroscopy showed that as the calcination temperature increased, there was a reduction in electrical conductance and the formation of polarons in the material.
Article Abstract
CeO samples were synthesized via the polymeric precursor method at different calcination temperatures. Electric properties were investigated using positron annihilation lifetime spectroscopy, electron paramagnetic resonance spectroscopy, and complex impedance spectroscopy. Reduction in the specific surface area of the particles with increasing calcination temperature along with morphological changes were observed. PALS depicted doubly ionized oxygen vacancies surrounded by two Ce3+ atoms, while the EPR spectroscopy showed a singly ionized oxygen vacancy surrounded by Ce3+ and Ce4+ ions. Impedance measurements unraveled the presence of polarons, while thermal treatments led to a lower electrical conductance, as the calcination temperature increased.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11483379 | PMC |
| http://dx.doi.org/10.1021/acsomega.4c03210 | DOI Listing |
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