Title :

Iron and Copper Nanoparticles Inside and Outside Carbon Nanotubes: Nanoconfinement, Migration, Interaction and Catalytic Performance in Fischer-Tropsch Synthesis

Author(s) :

Fellenberg, Ana [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Addad, Ahmed [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Hong, Jingping [Auteur]
Central South University [Changsha]
Simon, Pardis [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Kosto, Yuliia [Auteur]

Šmíd, Břetislav [Auteur]

Ji, Gang [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Khodakov, Andrei [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Journal title :

Journal of Catalysis

Abbreviated title :

Journal of Catalysis

Publisher :

Elsevier BV

Publication date :

2021-10

ISSN :

0021-9517

English abstract : [en]

Carbon materials have attracted increasing attention as supports for metal catalysts. Ironcontaining carbon nanotubes often promoted with copper have found application in Fischer-Tropsch synthesis, which provides an ...
Show more >Carbon materials have attracted increasing attention as supports for metal catalysts. Ironcontaining carbon nanotubes often promoted with copper have found application in Fischer-Tropsch synthesis, which provides an alternative way for conversion of renewable feedstocks to chemicals and fuels. In carbon nanotubes, the active phase can be nanoconfined inside the channels or localized on the outer surface. In most of previous work, the distribution of metal nanoparticles inside or outside carbon nanotubes is considered to be immobile during the catalyst activation or catalytic reaction. In this paper, we uncovered remarkable mobility of both iron and copper species in the bimetallic catalysts between inner carbon nanotube channels and outer surface, which occurs in carbon monoxide and syngas, while almost no migration of iron species proceeds in the monometallic catalysts. This mobility is enhanced by noticeable fragility and defects in carbon nanotubes, which appear on their impregnation with the acid solutions of metal precursors and precursor decomposition. Remarkable mobility of iron and copper species in bimetallic catalysts affects the genesis of iron active sites, and enhances interaction of iron with the promoter. In the bimetallic iron-copper catalysts, the major increase in the activity was attributed to higher reaction turnover frequency over iron surface sites located in a close proximity with copper.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Non spécifiée

Administrative institution(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Métallurgie Physique et Génie des Matériaux

Submission date :

2021-10-25T19:38:39Z
2021-10-27T06:10:01Z