New Features and Uncovered Benefits of Polycrystalline Magnetite as Reusable Catalyst in Reductive Chemical Conversion

Sungjun Bae 1 Suji Gim 2 Hyungjun Kim 2 Vincent Dorcet 3 Mathieu Pasturel 3 Jean-Marc Greneche 4 Gopala Krishna Darbha 5 Khalil Hanna 3
1 Konkuk University [Seoul]
2 KAIST - Korea Advanced Institute of Science and Technology
3 ISCR - Institut des Sciences Chimiques de Rennes
4 IMMM - Institut des molécules et des matériaux du Mans
5 KIT - Karlsruher Institut für Technologie
Abstract : Magnetite is one of the most well-characterized and used iron oxides in a variety of research and industrial fields. Its easy separation by magnetism has attracted great attention for use as a support material for various noble metallic catalysts. Here, we report for the first time that bare polycrystalline magnetite can show a remarkable catalytic activity toward p-nitrophenol reduction by sodium borohydride, while three other single-crystal magnetite samples exhibit little effect on the catalysis. Electron and atomic force microscopies and Mössbauer spectrometry showed that elemental Fe nanoparticles were formed on the surface of polycrystalline magnetite. Density functional theory calculation further elucidated that the Fe atom exposed at the high-index magnetite surface develops a significant Fe–BH3 interaction and that its leaching-out process can be substantially promoted. Surprisingly, recycling tests showed that this great activity could be fully preserved up to 10 reaction cycles, in contrast to the other noble metal-based catalysts that showed a decrease in the catalytic activity as the reaction cycle increased.
Type de document :
Article dans une revue
The Journal of Physical Chemistry C, ACS American Chemical Society - Publications, 2017, 121 (45), pp.25195-25205. 〈10.1021/acs.jpcc.7b08178〉
Liste complète des métadonnées

Littérature citée [9 références]  Voir  Masquer  Télécharger
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01659405
Contributeur : Laurent Jonchère <>
Soumis le : jeudi 11 janvier 2018 - 11:01:08
Dernière modification le : vendredi 25 mai 2018 - 01:26:22
Document(s) archivé(s) le : samedi 5 mai 2018 - 13:53:10

Fichier

Bae et al. - 2017 - New Featur...
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

UR1-UFR-SPM | INC-CNRS | ISCR-PRATS | ISCR-CSM | SCR-CIP | UNIV-LEMANS | ISCR | UNIV-RENNES | SCR-MI-INSA

Citation

Sungjun Bae, Suji Gim, Hyungjun Kim, Vincent Dorcet, Mathieu Pasturel, et al.. New Features and Uncovered Benefits of Polycrystalline Magnetite as Reusable Catalyst in Reductive Chemical Conversion. The Journal of Physical Chemistry C, ACS American Chemical Society - Publications, 2017, 121 (45), pp.25195-25205. 〈10.1021/acs.jpcc.7b08178〉. 〈hal-01659405〉

Exporter

BibTeX TEI DC DCterms EndNote

Partager

Métriques

Consultations de la notice

170

Téléchargements de fichiers

4