Metal-Decorated Opal-Like Silica Catalysts: High-Temperature Reconstructions in Cobalt-Ceria Active Layer during Simultaneous Oxidation of CO and Hydrocarbons | Sciact - CRIS-система Института катализа

Metal-Decorated Opal-Like Silica Catalysts: High-Temperature Reconstructions in Cobalt-Ceria Active Layer during Simultaneous Oxidation of CO and Hydrocarbons Научная публикация

Журнал

Applied Catalysis A: General
ISSN: 0926-860X , E-ISSN: 1873-3875

Вых. Данные

Год: 2024, Том: 687, Номер статьи : 119981, Страниц : 14 DOI: 10.1016/j.apcata.2024.119981

Ключевые слова

Cobalt; ceria; opal-like silica; prompt thermal aging; catalytic oxidation

Авторы

Veselov Grigory B. ¹ , Eurov Daniil A. ² , Shilina Marina I. ³ , Rostovshchikova Tatiana N. ³ , Stoyanovskii Vladimir O. ¹ , Yagovkina Maria A. ² , Kurdyukov Dmitry A. ² , Vedyagin Aleksey A. ¹

Организации

1	Boreskov Institute of Catalysis, 630090 Novosibirsk, Russia
2	Ioffe Institute, 194021 St. Petersburg, Russia
3	Lomonosov Moscow State University, 119991 Moscow, Russia

Информация о финансировании (3)

1	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	FWUR-2024-0034
2	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	АААА-А21-121011590090-7
3	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	FFUG-2024-0017

Opal-like silica, which represents a new class of SiO2-based nanomaterials, was used as a support for the deposition of cobalt and cerium oxides as active components. A series of samples was prepared and tested in the oxidation of CO and hydrocarbons in a prompt thermal aging regime. As revealed by a set of physicochemical methods, the initial catalytic performance of the samples is high (T50 = 214 °С) due to the emergence of new catalytic sites, which appeared as a result of interaction between Co and Ce oxides located between silica nanospheres in a close proximity to each other. At 800 °C, these particles undergo agglomeration, which is expressed in a slight deactivation of the catalysts (T50 ≥ 260 °С). The bulk silicate phase is formed at 900 °C, thus leading to further deactivation. Recovering of the catalytic activity (T50 = 252 °С) takes place at 1000 °С.

Veselov G.B. , Eurov D.A. , Shilina M.I. , Rostovshchikova T.N. , Stoyanovskii V.O. , Yagovkina M.A. , Kurdyukov D.A. , Vedyagin A.A.
Metal-Decorated Opal-Like Silica Catalysts: High-Temperature Reconstructions in Cobalt-Ceria Active Layer during Simultaneous Oxidation of CO and Hydrocarbons
Applied Catalysis A: General. 2024. V.687. 119981 :1-14. DOI: 10.1016/j.apcata.2024.119981 WOS Scopus CAPlus OpenAlex

Поступила в редакцию:	12 сент. 2024 г.
Принята к публикации:	14 окт. 2024 г.
Опубликована online:	15 окт. 2024 г.
Опубликована в печати:	25 нояб. 2024 г.

Web of science:	WOS:001338720400001
Scopus:	2-s2.0-85206451388
Chemical Abstracts:	2024:2244148
OpenAlex:	W4403418076

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