Title :

Roles of titania and plasmonic gold nanoparticles of different sizes in photocatalytic methane coupling at room temperature

Author(s) :

Hu, Di [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Dong, Chunyang [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Belhout, Samir [Auteur]
Helsingin yliopisto = Helsingfors universitet = University of Helsinki
Shetty, Shwetha [Auteur]
Helsingin yliopisto = Helsingfors universitet = University of Helsinki
Ng, Henry [Auteur]
Helsingin yliopisto = Helsingfors universitet = University of Helsinki
Brasseur, Paul [Auteur]
Helsingin yliopisto = Helsingfors universitet = University of Helsinki
Bezerra, Leticia S. [Auteur]
Helsingin yliopisto = Helsingfors universitet = University of Helsinki
Ben Tayeb Meziane, Karima [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Simon, Pardis [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Addad, Ahmed [Auteur]
Institut Michel Eugène Chevreul - FR 2638 [IMEC]
Virginie, Mirella [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Wojcieszak, Robert [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Ordomsky, Vitaly [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Camargo, Pedro H. C. [Auteur]
Helsingin yliopisto = Helsingfors universitet = University of Helsinki
Khodakov, Andrei [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Journal title :

Materials today energy

Abbreviated title :

Mater. Today Energy

Volume number :

36

Pages :

101358

Publication date :

2024-02-05

ISSN :

2468-6069

English keyword(s) :

Structure sensitivitys
Plasmonic effect
Photocatalysis
Mild conditions
Methane activation

HAL domain(s) :

Chimie/Catalyse

English abstract : [en]

Methane, one of the most abundant molecules on Earth and a major greenhouse gas, comes from renewable and fossil resources. The utilization of methane as a starting material for synthesis of chemicals is attractive but ...
Show more >Methane, one of the most abundant molecules on Earth and a major greenhouse gas, comes from renewable and fossil resources. The utilization of methane as a starting material for synthesis of chemicals is attractive but encounters numerous challenges due to high thermodynamic stability and extreme inertness of methane. Most of methane reactions occur at high temperatures and coincide with major emissions of CO2. Semiconductor photocatalysis offers an efficient alternative for methane conversion at room temperature. In this paper, we studied the plasmonic gold nanoparticles (NPs) with size from 6 nm to 60 nm supported on titania semiconductor in methane nonoxidative and oxidative couplings and elucidated their roles in the reactions. Strikingly, an efficient oxidative coupling with ethane production of 819 μmol/g/h and a coupling selectivity up to 86% was achieved in a flow reactor under optimized conditions. The reaction proceeded through methane activation over oxygen vacancies on Ultraviolet-excited titania. Gold NPs played important roles in charge separation and provided sites for soft oxygen activation. The size of gold NPs was found to be not noticeably affecting methane coupling.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 :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Research team(s) :

Propriétés magnéto structurales des matériaux (PMSM)
Catalyse pour l’énergie et la synthèse de molécules plateforme (CEMOP)
Valorisation des alcanes et de la biomasse (VAALBIO)

Submission date :

2024-02-08T22:01:16Z
2024-02-21T17:02:17Z
2024-02-21T17:04:50Z
2024-02-27T13:43:14Z