Crystal Plane Dependent Dispersion of Cobalt Metal on Metastable Aluminas | Sciact - CRIS-система Института катализа

Crystal Plane Dependent Dispersion of Cobalt Metal on Metastable Aluminas Научная публикация

Журнал

Journal of Catalysis
ISSN: 0021-9517 , E-ISSN: 1090-2694

Вых. Данные

Год: 2023, Том: 421, Страницы: 210-220 Страниц : 11 DOI: 10.1016/j.jcat.2023.03.018, 10.26434/chemrxiv-2022-xfrt5

Ключевые слова

heterogeneous catalysis, 59Co NMR, HRTEM, Internal Field NMR, DFT, metal support interaction, Fischer-Tropsch synthesis

Авторы

Yakovlev Ilya V. ^1,2,3 , Zaikovskii Vladimir I. ² , Kazakova Mariya A. ² , Papulovskiy Evgeniy S. ² , Lapina Olga B. ^1,2 , d'Espinose de Lacaillerie Jean-Baptiste ³

Организации

1	Novosibirsk State University, Pirogova Street 1, 630090 Novosibirsk, Russia
2	Boreskov Institute of Catalysis SB RAS, Prospekt Lavrentieva 5, 630090 Novosibirsk, Russia
3	SIMM, UMR CNRS 7615, ESPCI Paris, Université PSL, Sorbonne Université, 10 Rue Vauquelin, 75005 Paris, France

Информация о финансировании (4)

1	Российский фонд фундаментальных исследований	20-33-90184 (АААА-А20-120101390009-0)
2	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	0239-2021-0010
3	Посольство Франции в России
4	The City of Paris Industrial Physics and Chemistry Higher Educational Institution

Metallic Co nanoparticles, widely used and studied as supported heterogeneous catalysts for Fischer-Tropsch synthesis (FTS), display catalytic properties that can vary significantly depending on their size and crystal structure. In this work, we used 59Co Internal Field NMR (59Co IF NMR) complemented by high-resolution transmission electron microscopy (HRTEM) to demonstrate the influence of strong metal-support interaction on two noticeably different metastable alumina phases - γ-Al2O3 and χ-Al2O3. According to 59Co IF NMR and HRTEM, the metallic particles supported on χ-Al2O3 were larger and displayed a significantly higher content of hcp Co phase, which are known to be more active and selective to C5+ in FTS. The 1H NMR chemical shifts of hydroxyl groups anchored to the (110) and (111) spinel crystal planes were calculated by DFT. It revealed that the hydroxyl coverage of γ-Al2O3 facilitates the dispersion of Co precursor over the surface of the support, ultimately leading to the formation of smaller metal Co nanoparticles on γ-Al2O3, than on χ-Al2O3.

Yakovlev I.V. , Zaikovskii V.I. , Kazakova M.A. , Papulovskiy E.S. , Lapina O.B. , d'Espinose de Lacaillerie J-B.
Crystal Plane Dependent Dispersion of Cobalt Metal on Metastable Aluminas
Journal of Catalysis. 2023. V.421. P.210-220. DOI: 10.1016/j.jcat.2023.03.018, 10.26434/chemrxiv-2022-xfrt5 Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	29 янв. 2023 г.
Принята к публикации:	9 мар. 2023 г.
Опубликована online:	15 мар. 2023 г.
Опубликована в печати:	1 мая 2023 г.

Scopus:	2-s2.0-85150801546
РИНЦ:	54082153
Chemical Abstracts:	2023:655056
Chemical Abstracts (print):	182:208828
OpenAlex:	W4324135632

БД	Цитирований
Scopus	2
РИНЦ	2
OpenAlex	2