The formation of nanodomains of Ce6O11 in ceria catalyzed soot combustion

被引：41

作者：

Aneggi, Eleonora ^{[1
]}

Divins, Nuria J. ^{[2
,3
]}

de Leitenburg, Carla ^{[1
]}

Llorca, Jordi ^{[2
,3
]}

Trovarelli, Alessandro ^{[1
]}

机构：

[1] Univ Udine, Dipartimento Chim Fis & Ambiente, I-33100 Udine, Italy

[2] Univ Politecn Cataluna, Inst Tecn Energet, E-08028 Barcelona, Spain

[3] Univ Politecn Cataluna, Ctr Res Nanoengn, E-08028 Barcelona, Spain

来源：

JOURNAL OF CATALYSIS | 2014年 / 312卷

关键词：

Ceria CeO2; Soot combustion; Oxygen storage capacity; Ce6O11; EXPERIMENTAL MICROKINETIC APPROACH; DIESEL SOOT; OXIDATION; CONTACTS; OXIDES; OXYGEN; IMPACT; CEO2;

D O I：

10.1016/j.jcat.2014.01.020

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：

The behavior of a series of CeO2 catalysts in soot combustion reaction was investigated by HRTEM and XPS. It is shown that nanodomains of reduced ceria in the form of Ce6O11 develop during reaction under oxygen-containing atmosphere, supporting the idea that the reaction between CeO2 and carbon particulate results in the formation of a reduced ceria phase. The fact that oxygen-deficient cerium oxide particles are not in contact with soot, whereas regular CeO2 particles are also found in contact with particulate, may suggest that reaction with soot implies the extraction of oxygen from the CeO2 fluorite lattice, confirming the importance of redox mechanism in ceria-catalyzed soot oxidation. (c) 2014 Elsevier Inc. All rights reserved.

引用

页码：191 / 194

页数：4

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