MXene-supported single-atom and nano catalysts for effective gas-phase hydrogenation reactions - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Materials Today Catalysis Année : 2023

MXene-supported single-atom and nano catalysts for effective gas-phase hydrogenation reactions

Résumé

Transition metal carbides are known as efficient catalysts or catalyst supports and two-dimensional carbides (MXenes) offer renewed possibilities to anchor metal atoms and promote catalytic performances. This paper first presents an in-depth study of the elaboration of Pt or Pd-loaded Ti3C2Tx MXenes and their unstacking for gas-phase catalysis investigations, along with step-by-step characterization by XRD, XPS, SEM and STEM. In particular, the influence of the MXene preparation method (HF vs. LiF-HCl etchants) on surface structure/composition and metal dispersion/oxidation state is disclosed. Second, the catalytic hydrogenation performances of these materials are reported, and reveal the interest of low-loaded Pt/MXene single-atom catalysts in terms of selectivity and resistance to sintering. They present an unusually high selectivity to 2-butene – without butane formation – in butadiene hydrogenation, a model reaction of applied interest for the petrochemical industry. Moreover, in CO2 reduction to CO (reverse water-gas shift reaction, relevant to greenhouse-gas valorization), these catalysts exhibit up to 99% selectivity and a superior Pt-molar activity with respect to oxide-supported references. This work may stimulate the elaboration and investigation of other MXene-based systems for thermal heterogeneous catalysis, which remains rarely addressed.

Domaines

Catalyse
Fichier principal
Vignette du fichier
089 - MaterToday Catal 2 (2023) 1000010 Yan Piccolo.pdf (8.51 Mo) Télécharger le fichier
Origine : Publication financée par une institution

Dates et versions

hal-04284594 , version 1 (14-11-2023)

Identifiants

Citer

Yilong Yan, Djibril Sall, Lola Loupias, Stéphane Célérier, Mimoun Aouine, et al.. MXene-supported single-atom and nano catalysts for effective gas-phase hydrogenation reactions. Materials Today Catalysis, 2023, 2, pp.100010. ⟨10.1016/j.mtcata.2023.100010⟩. ⟨hal-04284594⟩
27 Consultations
8 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More