Title :

Pt particles sintering on Pt/SiO2 during water denitrification

Author(s) :

Zaki, A. [Auteur]
Lancelot, Christine [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Dacquin, Jean-Philippe [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Granger, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Journal title :

Catalysis Communications

Abbreviated title :

Catalysis Communications

Volume number :

148

Pages :

106168

Publication date :

2021-01

ISSN :

15667367

English abstract : [en]

Platinum particle growth in aqueous phase has been investigated at 20 °C in the course of nitrite (NO2−) reduction by H2 reaction. A shift from a monomodal to a bimodal particle size distribution on used catalysts is ...
Show more >Platinum particle growth in aqueous phase has been investigated at 20 °C in the course of nitrite (NO2−) reduction by H2 reaction. A shift from a monomodal to a bimodal particle size distribution on used catalysts is accompanied with the disappearance of the smallest Pt particles in agreement with an Ostwald ripening mechanism. A two-step process involving consecutive dissolution and re- aggregation to form larger particles has been suggested according to a redox mechanism. Accordingly, the growth of large Pt particles at the expense of small ones induces a strengthening of the metallic character and a loss of Pt dispersion.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille

Collections :

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

Research team(s) :

Catalyse pour l’énergie et la synthèse de molécules plateforme (CEMOP)
Matériaux pour la catalyse (MATCAT)
Remédiation et matériaux catalytiques (REMCAT)

Submission date :

2021-12-08T09:53:24Z
2022-03-01T16:29:51Z