Titre :

Cooperative effect of Pt single-atoms and nanoparticles supported on carbonaceous materials: Catalytic NO decomposition as a probe reaction

Auteur(s) :

Granger, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Wu, Jianxiong [Auteur]
Ba, Housseinou [Auteur]
Baaziz, Walid [Auteur]
Ersen, Ovidiu [Auteur]
Zafeiratos, Spyridon [Auteur]
Nhut, Jean-Mario [Auteur]
Giambastiani, Giuliano [Auteur]
Pham-Huu, Cuong [Auteur]

Titre de la revue :

Applied Catalysis A : General

Numéro :

617

Pagination :

118103

Éditeur :

Elsevier

Date de publication :

2021-05-05

ISSN :

0926-860X

Discipline(s) HAL :

Chimie/Catalyse

Résumé en anglais : [en]

Activated carbon containing highly dispersed platinum (Pt/C with ca. 1 wt.%) catalyst was synthesized according to the simple sonochemistry route followed by a drying step in air at 130 °C. STEM-HAADF micrographs indicate ...
Lire la suite >Activated carbon containing highly dispersed platinum (Pt/C with ca. 1 wt.%) catalyst was synthesized according to the simple sonochemistry route followed by a drying step in air at 130 °C. STEM-HAADF micrographs indicate the presence of Pt single atoms (SAs) homogeneously dispersed on the activated carbon. The catalytic decomposition of NO has been investigated on samples pre-reduced at 250 °C and 500 °C. The Pt SAs remain stable and exhibit a surprisingly high activity which does not reflect the usually observed structure-sensitivity of NO dissociation. In addition, remarkable catalyst stability is observed after reaction at 650 °C in the presence of water. On the other hand, pre-reduction at 500 °C induces a strong deactivation related to a coalescence process with the subsequent generation of large Pt clusters, despite some small metal nanoparticles are still present in the sample. Accordingly, the structure-sensitivity of this reaction is restored. All these observations have been rationalized through the examinations of various reaction mechanisms.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Projet ANR :

CaTaLyst foR TrAnsItion to ReNewable Energy FutuRe

Établissement(s) :

CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille

Collections :

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

Équipe(s) de recherche :

Remédiation et matériaux catalytiques (REMCAT)

Date de dépôt :

2022-03-24T09:02:35Z
2023-05-04T13:33:52Z