Crystal Plane Dependent Dispersion of Cobalt Metal on Metastable Aluminas | Sciact - CRIS-system of Boreskov Institute of Catalysis

Crystal Plane Dependent Dispersion of Cobalt Metal on Metastable Aluminas Full article

Journal

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

Output data

Year: 2023, Volume: 421, Pages: 210-220 Pages count : 11 DOI: 10.1016/j.jcat.2023.03.018, 10.26434/chemrxiv-2022-xfrt5

Tags

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

Authors

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

Affiliations

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

Funding (4)

1	Russian Foundation for Basic Research	20-33-90184 (АААА-А20-120101390009-0)
2	Ministry of Science and Higher Education of the Russian Federation	0239-2021-0010
3	French Embassy in Moscow
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 ANCAN OpenAlex

Submitted:	Jan 29, 2023
Accepted:	Mar 9, 2023
Published online:	Mar 15, 2023
Published print:	May 1, 2023

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

DB	Citing
Scopus	2
Elibrary	2
OpenAlex	2