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Supported LaCoO3 perovskite-like oxides for N2O decomposition: The key role of the support nature and LaCoO3 contentстатья
Дата последнего поиска статьи во внешних источниках: 10 июля 2024 г.
- Авторы: Zemlianskii Petr, Morozov Daniil, Kapustin Gennady, Davshan Nikolai, Olga P.Tkachenko, Konstantin B.Kalmykov, Chernyshev Vladimir, Kustov Alexander, Kustov Leonid
- Журнал: Colloids and Surfaces A: Physicochemical and Engineering Aspects
- Том: 698
- Год издания: 2024
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 134546
- DOI: 10.1016/j.colsurfa.2024.134546
- Аннотация: In this work a detailed comparison of the N2O decomposition catalytic performance of LaCoO3 perovskite-likemixed oxides supported over different commercial materials was conducted. Zirconia-, silica- and γ-aluminabasedsupports were studied. Zirconia-based supports turned out to be the most applicable because of the formationof the pure LaCoO3 perovskite phase on their surface. Among these supports, ZrO2-La revealed to possessthe best activity owing to the highest Co2+/Co3+ (0.82) and Oads./OL (0.67) ratios on its surface. The raw ofactivities was as follows: LaCoO3(20 %)/ZrO2-La > LaCoO3(20 %)/ZrO2 > LaCoO3(20 %)/ZrO2-W. When theLaCoO3 content in LaCoO3/ZrO2-La was 20 wt%, the maximum of activity was observed – 94.78 mmol(N2O)/[g(cat.)⋅h] at 450 ◦C. This fact was in accordance with the highest Co2+/Co3+ (0.82) and Oads./OL (0.67) ratios atthe 20 wt% LaCoO3 content. Coordinatively unsaturated Co2+, forming Lewis acid-base pairs, were proposed tobe the active sites of the zirconia-based LaCoO3 catalysts in the N2O decomposition.
- Добавил в систему: Чернышев Владимир Васильевич
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