Реферат: This paper reports a new approach for the synthesis of the Y- and La-substituted nanocrystalline pyrochlore phase (pyr-Ce2Zr2O7). To prevent the sintering of the particles during the high-temperature reduction, the pristine material t-Zr0.45Ce0.45Y0.05La0.05O2 was synthesized in a carbon shell. The subsequent re-oxidation of the obtained phase under mild conditions resulted in its transformation into nanocrystalline κ-Ce2Zr2O8. Thus, it was demonstrated that the use of a carbon-shell approach enables the size stabilization of the oxide particles. At a synthesis temperature of 1400 °C and a duration of 6 h, the content of the pyrochlore-type cation ordering phase was about 60 wt%. Its specific surface area was as high as 74 m2/g, and the crystallites were of ~15 nm in size. The highly dispersed pyr-Ce2Zr2O7+δ phase possesses a higher average oxidation state under atmospheric conditions compared to the bulk pyr-Ce2Zr2O7+δ phase synthesized by the conventional technique.

Библиографическая ссылка: Stoyanovskii V.O. , Vedyagin A.A.
Nanocrystalline Pyrochlore Ce2Zr2O7 and κ-Ce2Zr2O8 Phases with High Specific Surface Area Prepared via a Carbon-Shell Approach
Materials Letters. 2026. V.409. 140209 :1-4. DOI: 10.1016/j.matlet.2026.140209 OpenAlex

Даты:

Поступила в редакцию:	17 дек. 2025 г.
Принята к публикации:	2 февр. 2026 г.
Опубликована online:	3 февр. 2026 г.
Опубликована в печати:	15 апр. 2026 г.

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