Title :

Probing the core and surface composition of nanoalloy to rationalize its selectivity: Study of Ni-Fe/SiO2 catalysts for liquid-phase hydrogenation

Author(s) :

Shi, D. C. [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Sadier, Achraf [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Girardon, Jean-Sébastien [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Mamede, Anne-Sophie [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Ciotonea, C. [Auteur]
Marinova, Maya [Auteur]
Institut Chevreul - FR2638
Stievano, Lorenzo [Auteur]
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM]
Sougrati, M. T. [Auteur]
La Fontaine, C. [Auteur]
Beamline SWING, Synchrotron SOLEIL
PAUL, Sébastien [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Wojcieszak, Robert [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Marceau, Eric [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Journal title :

Chem Catalysis

Abbreviated title :

Chem. Catalysis

Volume number :

2

Pages :

-

Publication date :

2023-01-21

ISSN :

2667-1093

English abstract : [en]

Rationalization of the catalytic performance of bimetallic Ni-Fe catalysts in selective hydrogenation reactions is based on the Ni and Fe distribution within the nanoparticles and at their surface. By applying a combination ...
Show more >Rationalization of the catalytic performance of bimetallic Ni-Fe catalysts in selective hydrogenation reactions is based on the Ni and Fe distribution within the nanoparticles and at their surface. By applying a combination of element-specific and surface-specific characterization techniques (57Fe Mössbauer spectroscopy, X-ray absorption spectroscopy, and low-energy ion scattering) to a series of Ni-Fe/SiO2 catalysts differing by their Ni and Fe molar proportions, we showed that reduced Ni-Fe nanoparticles exhibit a gradient of Ni concentrations from a Ni-enriched core to Ni-depleted, Fe-enriched outer shells. A surface proportion of 35–45 Ni atom % showed the highest yield of furfuryl alcohol in liquid-phase hydroconversion of furfural. These results point to the need for Ni surface domains of limited size among Fe atoms to restrict the hydroconversion process to its first stage rather than to nominal compositions of the catalyst or to surface sites that would appear to be particularly selective per se.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Submission date :

2024-01-20T00:42:56Z
2024-02-09T15:53:58Z