Title :

New insights into the role of Pd-Ce interface for methane activation on monolithic supported Pd catalysts: A step forward the development of novel PGM Three-Way Catalysts for natural gas fueled engines

Author(s) :

Chen, Jianjun [Auteur]
Wu, Yang [Auteur]
Hu, Wei [Auteur]
Qu, Pengfei [Auteur]
Zhang, Guochen [Auteur]
Granger, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Zhong, Lin [Auteur]
Chen, Yaoqiang [Auteur]

Journal title :

Applied Catalysis B. Environmental

Abbreviated title :

Applied Catalysis B: Environmental

Volume number :

264

Pages :

118475

Publication date :

2020-05

ISSN :

09263373

English abstract : [en]

This study reports a significant impact of the calcination temperature on the performances of Pd/Al2O3-CeO2 Three-Way-Catalysts to treat exhaust from natural gas fueled vehicles. Calcination from 550 °C to 950 °C led to ...
Show more >This study reports a significant impact of the calcination temperature on the performances of Pd/Al2O3-CeO2 Three-Way-Catalysts to treat exhaust from natural gas fueled vehicles. Calcination from 550 °C to 950 °C led to Pd particles in the range 1.9-8.5 nm. It was found that PdO can be reduced to more active Pd0 species under stoichiometric NGV conditions. More specifically, the 1.9 nm Pd particles, developing stronger Pd-Ce interaction were found more reducible and correspond to enhanced catalytic properties towards methane abatement. At high calcination temperature, corresponding to larger Pd particles, the deterioration of the Pd-Ce interface is accompanied with lower TOF jointly with higher activation barriers. Accordingly, the Pd0-PdO interaction becomes prevalent to activate methane. Based on these observations, it was concluded that Pd0-Ce and Pd0-PdO interface related to the Pd particle size may be considered as criteria for identifying the performance of Pd-based NGV catalysts.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) :

Remédiation et matériaux catalytiques (REMCAT)

Submission date :

2021-12-08T09:53:06Z
2022-03-01T11:06:55Z