Synthesis of Complex Aluminum–Cobalt Systems Using a Thermoactivated Gibbsite Product | Sciact - CRIS-система Института катализа

Synthesis of Complex Aluminum–Cobalt Systems Using a Thermoactivated Gibbsite Product Научная публикация

Журнал

Russian Journal of Physical Chemistry A
ISSN: 0036-0244 , E-ISSN: 1531-863X

Вых. Данные

Год: 2024, Том: 98, Номер: 13, Страницы: 3046-3060 Страниц : 15 DOI: 10.1134/s0036024424702303

Ключевые слова

gibbsite, product of centrifugal thermal activation of gibbsite, Co3O4 spinel, CoAl2O4 spinel

Авторы

Zhuzhgov A.V. ¹ , Gorkusha A.S. ^1,2 , Suprun E.A. ¹ , Lysikov A.I. ^1,2 , Isupova L.A. ¹

Организации

1	Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
2	Novosibirsk National Research State University, Novosibirsk, 630090 Russia

Информация о финансировании (1)

Российский научный фонд

23-23-00241

The authors explore the possibility of synthesizing highly loaded mixed aluminum–cobalt spinels via the hydrochemical treatment of suspensions of a powder of the product of the centrifugal thermal activation of gibbsite in aqueous solutions of cobalt nitrate under room-temperature or hydrothermal conditions via X-ray diffraction, thermal, microscopic, adsorption, and chemical analysis. It is found that the heat treatment of products of hydrochemical interaction (xerogels) in the range of 350–850°C produces Co3O4 and CoAl2O4 spinel phases with different phase ratios, depending on the conditions of synthesis. The hydrochemical treatment of suspensions at room temperature ensures the dominant formation of a Co3O4 phase after calcination, while hydrothermal treatment at 150°C results in deeper interaction between the suspension components during treatment, ensuring the formation of CoAl2O4 after heat treatment. It is shown that the maximum content of CoAl2O4 spinel (90%, according to H2-TPR) is observed for the hydrothermal product calcined at a temperature 850°C. The considered technique yields complex aluminum–cobalt compounds with different phase ratios, allowing the complete elimination of effluents. It also reduces the number of stages of synthesis, the amount of initial reagents, and 75 wt % of the total amount of nitrates, relative to using classical nitrate coprecipitation.

Zhuzhgov A.V. , Gorkusha A.S. , Suprun E.A. , Lysikov A.I. , Isupova L.A.
Synthesis of Complex Aluminum–Cobalt Systems Using a Thermoactivated Gibbsite Product
Russian Journal of Physical Chemistry A. 2024. V.98. N13. P.3046-3060. DOI: 10.1134/s0036024424702303 WOS Scopus РИНЦ OpenAlex

Поступила в редакцию:	11 апр. 2024 г.
Принята к публикации:	20 мая 2024 г.
Опубликована в печати:	1 дек. 2024 г.
Опубликована online:	17 янв. 2025 г.

Web of science:	WOS:001400872500021
Scopus:	2-s2.0-85218110444
РИНЦ:	79720810
OpenAlex:	W4406525964

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