Combined theoretical and experimental kinetic approach for methane conversion on model supported Pd/La0.7MnO3 NGV catalyst: Sensitivity to inlet gas composition and consequence on the Pd-support interface

被引：5

作者：

Zheng, Yuanshuang ^{[1
]}

Decoster, Amaury ^{[1
]}

Osti, Andrea ^{[1
,2
]}

Glisenti, Antonella ^{[2
,3
]}

Dacquin, Jean-Philippe ^{[1
]}

Dhainaut, Fabien ^{[1
]}

Heyte, Svetlana ^{[1
]}

Granger, Pascal ^{[1
]}

机构：

[1] Univ Artois, Univ Lille, CNRS, Cent Lille,UMR 8181,UCCS Unitede Catalyse & Chim S, F-59000 Lille, France

[2] Univ Padua, Dept Chem Sci, Via F Marzolo 1, I-35131 Padua, Italy

[3] CNR ICMATE, INSTM, Via F Marzolo 1, I-35131 Padua, Italy

来源：

APPLIED CATALYSIS A-GENERAL | 2022年 / 641卷

关键词：

Methane combustion; NGV three-way catalyst; Palladium; Perovskite; Kinetics; COMPLETE OXIDATION; PALLADIUM; ABATEMENT; NO;

D O I：

10.1016/j.apcata.2022.118687

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

New insights into reaction mechanism for catalytic methane combustion are provided in broad operating conditions on Pd/La0.7MnO3 as model natural gas vehicle catalyst. Under lean and dry conditions, a dual mechanism is suggested with active sites combining reactive oxygen species from La0.7MnO3 and palladium instead of single site reaction mechanism. Aging in wet atmosphere has no consequence on the kinetic behavior. On the other hand, in wet atmosphere near the stoichiometry, strong accumulation of hydroxyl groups on the support would suppress the metal-support interface. Accordingly, methane combustion would take place only on Pd particles.

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页数：6

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