Title :

Rational preparation of Ag and Au bimetallic catalysts for the hydrocarbon-SCR of NOx: Sequential deposition vs. coprecipitation method

Author(s) :

More, Pavan M. [Auteur]
National Chemical Laboratory [NCL]
Council of Scientific and Industrial Research [India] [CSIR]
Nguyen, Duy L. [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Dongare, Mohan K. [Auteur]
National Chemical Laboratory [NCL]
Umbarkar, Shubhangi B. [Auteur]

Council of Scientific and Industrial Research [India] [CSIR]
Nuns, Nicolas [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Girardon, Jean-Sébastien [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Dujardin, Christophe [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Lancelot, Christine [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Mamede, Anne-Sophie [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Granger, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]

Journal title :

Applied Catalysis B: Environmental

Volume number :

162

Pages :

11-20

Publisher :

Elsevier

Publication date :

2015-01

English keyword(s) :

HC-SCR
Au–Ag particles
Co-precipitation
DeNOx reaction

HAL domain(s) :

Chimie/Catalyse
Chimie/Chimie théorique et/ou physique

English abstract : [en]

This study emphasizes the importance of the preparation method for bimetallic Au–Ag catalysts supported on alumina in the selective reduction of NOx by hydrocarbons with gas feed compositions representative of diesel fuelled ...
Show more >This study emphasizes the importance of the preparation method for bimetallic Au–Ag catalysts supported on alumina in the selective reduction of NOx by hydrocarbons with gas feed compositions representative of diesel fuelled engine exhaust gas. An optimal balance between oxidative and reductive surface properties is obtained when Au and Ag are successively introduced. Significant re-dispersion processes take place when the catalyst runs at 500 °C leading to a gain in activity at low temperature and ascribed to a better interaction between Au and Ag species. Co-precipitation leads to a preferential formation of intermetallic Au–Ag particles which is detrimental to the catalytic performances. Aging at 500 °C leads to a significant particle sintering and a strengthening of the metallic character.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

ENSCL
Université de Lille
CNRS
Centrale Lille
Univ. Artois

Collections :

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

Research team(s) :

Catalyse pour l’énergie (CATEN)
Modélisation et spectroscopies (MODSPEC)
Remédiation et matériaux catalytiques (REMCAT)
Valorisation des alcanes et de la biomasse (VAALBIO)

Submission date :

2019-09-24T14:34:34Z
2021-03-30T13:30:48Z