The Effect of Calcination Gas Atmosphere on the Structural Organization of Ru/Ce0.75Zr0.25O2 Catalysts for CO2 Methanation | Sciact - CRIS-система Института катализа

The Effect of Calcination Gas Atmosphere on the Structural Organization of Ru/Ce0.75Zr0.25O2 Catalysts for CO2 Methanation Научная публикация

Журнал

Colloids and Surfaces A: Physicochemical and Engineering Aspects
ISSN: 0927-7757

Вых. Данные

Год: 2024, Том: 702, Номер: 1, Номер статьи : 134962, Страниц : 11 DOI: 10.1016/j.colsurfa.2024.134962

Ключевые слова

Ruthenium; CO2 methanation; Metal dispersion; Structure; MSI; Interface

Авторы

Pakharukova Vera P. ^1,2 , Kharchenko Nadezhda A. ^1,2 , Stonkus Olga A. ¹ , Saraev Andrey A. ¹ , Gorlova Anna M. ¹ , Rogozhnikov Vladimir N. ¹ , Potemkin Dmitry I. ^1,2

Организации

1	Boreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, Novosibirsk 630090, Russia
2	Novosibirsk State University, Pirogova Street 2, Novosibirsk 630090, Russia

Информация о финансировании (1)

Российский научный фонд

21-73-20075

In this study, supported 5 wt% Ru/Ce0.75Zr0.25O2 catalysts were prepared by sorption-hydrolytic deposition technique, followed by calcination under different conditions, namely in reductive H2/N2 (Ru/CeZr_red) and oxidative air (Ru/CeZr_ox) atmospheres. A thorough characterization of the catalysts was carried out by XRD, CO chemisorption, HRTEM, Raman spectroscopy, XPS, and in situ DRIFTS. The findings showed that the choice of the calcination atmosphere has a great impact on the structural organization of the catalyst. Calcination in air results in the formation of the larger crystalline RuO2 particles, which tend to enlarge upon reduction under CO2 methanation conditions. The reductive treatment results in a much higher dispersion of supported Ru species and a more pronounced metal-support interaction (MSI). In the Ru/CeZr_red catalyst, a large amount of atomic scale Ru species was detected along with metallic Ru nanoparticles and clusters. However, it was found that the superiority of the Ru/CeZr_red catalyst in the Ru dispersion did not result in the significant advantage in the CO2 methanation activity. In situ DRIFTS results suggested that the MSI affects the ability of Ru species to adsorb and activate reagent molecules, in particular, enhances the adsorption strength of the intermediate CO species.

Pakharukova V.P. , Kharchenko N.A. , Stonkus O.A. , Saraev A.A. , Gorlova A.M. , Rogozhnikov V.N. , Potemkin D.I.
The Effect of Calcination Gas Atmosphere on the Structural Organization of Ru/Ce0.75Zr0.25O2 Catalysts for CO2 Methanation
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2024. V.702. N1. 134962 :1-11. DOI: 10.1016/j.colsurfa.2024.134962 WOS Scopus CAPlus OpenAlex

Поступила в редакцию:	7 июн. 2024 г.
Принята к публикации:	29 июл. 2024 г.
Опубликована online:	31 июл. 2024 г.
Опубликована в печати:	1 дек. 2024 г.

Web of science:	WOS:001290417200001
Scopus:	2-s2.0-85200443338
Chemical Abstracts:	2024:1724394
OpenAlex:	W4401198890

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