Title :

Electricity-driven selectivity in the photocatalytic oxidation of methane to carbon monoxide with liquid gallium-semiconductor composite

Author(s) :

Tran, My [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Skorynina, Alina [Auteur]
CELLS ALBA synchroton = ALBA Synchrotron [CELLS ALBA]
Addad, Ahmed [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Fadel, Ali [Auteur]
Institut Michel Eugène Chevreul - FR 2638 [IMEC]
Ben Tayeb, Karima [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Karmazin, Lydia [Auteur]
Institut Michel Eugène Chevreul - FR 2638 [IMEC]
Thomas, Louis [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Plateforme de Caractérisation Multi-Physiques - IEMN [PCMP - IEMN]
Corda, Massimo [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Wisse, Yevkeni [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Vovk, Evgeny [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Khodakov, Andrei [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Grandidier, Bruno [Auteur correspondant]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Physique - IEMN [PHYSIQUE - IEMN]
Ordomsky, Vitaly [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]

Journal title :

Applied Catalysis B: Environmental

Pages :

124834

Publisher :

Elsevier

Publication date :

2025-04

ISSN :

0926-3373

English keyword(s) :

Ga liquid metals
external electricity
photocatalytic methane conversion

HAL domain(s) :

Chimie

English abstract : [en]

Metal co-catalysts in oxide semiconductors are essential to enhance photocatalytic reaction, but the selectivity is often low due to the conversion of the target molecules as more reactive in comparison with the reagents. ...
Show more >Metal co-catalysts in oxide semiconductors are essential to enhance photocatalytic reaction, but the selectivity is often low due to the conversion of the target molecules as more reactive in comparison with the reagents. Here, we explore the influence of electricity on the activity and selectivity of liquid gallium as a co-catalyst loaded in TiO2 and ZSM-5 supports the photocatalytic oxidation of methane. We first show that the polarization of the photocatalytic chips allows a more efficient wetting of liquid gallium into the semiconductor matrices, which increases the availability of the photogenerated charge carriers for reactions and improves the overall activity of the composites. More importantly, the oxide skin surrounding the spread liquid is found to be charged, resulting in a significant reduction of the CO oxidation. An increase of the CO selectivity from 10 to 80 % upon polarization to 50 V, with a stable photocatalytic activity reaching 0.6 ± 0.01 mmol/g•h, makes the use of electricity quite appealing to tailor liquid metals in catalysis.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

ANR Project :

Caractérisation " operando ", multi-échelle et multi-technique, des catalyseurs bimétalliques

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL