Supported LaCoO3 perovskite-like oxides for N2O decomposition: The key role of the support nature and LaCoO3 content

Supported LaCoO3 perovskite-like oxides for N2O decomposition: The key role of the support nature and LaCoO3 content Научная публикация

Журнал

Colloids and Surfaces A: Physicochemical and Engineering Aspects
ISSN: 1873-4359 , E-ISSN: 0927-7757

Вых. Данные

Год: 2024, Том: 698, Номер статьи : 134546, Страниц : DOI: 10.1016/j.colsurfa.2024.134546

Авторы

Zemlianskii Petr ¹ , Morozov Daniil ² , Kapustin Gennady ¹ , Davshan Nikolai ¹ , Tkachenko Olga ¹ , Kalmykov Konstantin ³ , Chernyshev Vladimir ³ , Kustov Alexander ^3,2 , Kustov Leonid ^3,2,1

Организации

1	Zelinsky Institute of organic chemistry RAS, Pr. Leninsky, 47, Moscow 11991, Russia
2	National University of Science and Technology MISIS, Pr. Leninsky, 4, Moscow 119049, Russia
3	Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119234, Russia

In this work a detailed comparison of the N2O decomposition catalytic performance of LaCoO3 perovskite-like mixed oxides supported over different commercial materials was conducted. Zirconia-, silica- and γ-alumina-based supports were studied. Zirconia-based supports turned out to be the most applicable because of the formation of the pure LaCoO3 perovskite phase on their surface. Among these supports, ZrO2-La revealed to possess the best activity owing to the highest Co2+/Co3+ (0.82) and Oads./OL (0.67) ratios on its surface. The raw of activities was as follows: LaCoO3(20 %)/ZrO2-La > LaCoO3(20 %)/ZrO2 > LaCoO3(20 %)/ZrO2-W. When the LaCoO3 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 at the 20 wt% LaCoO3 content. Coordinatively unsaturated Co2+, forming Lewis acid-base pairs, were proposed to be the active sites of the zirconia-based LaCoO3 catalysts in the N2O decomposition.

Zemlianskii P. , Morozov D. , Kapustin G. , Davshan N. , Tkachenko O. , Kalmykov K. , Chernyshev V. , Kustov A. , Kustov L.
Supported LaCoO3 perovskite-like oxides for N2O decomposition: The key role of the support nature and LaCoO3 content
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2024. V.698. 134546 . DOI: 10.1016/j.colsurfa.2024.134546 WOS Scopus OpenAlex

Web of science:	WOS:001347111600001
Scopus:	2-s2.0-85196533209
OpenAlex:	W4399803595

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Scopus	4
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