Ceria-catalyzed soot oxidation studied by environmental transmission electron microscopy

Søren Bredmose Simonsen; S. Dahl; E. Johnson; S. Helveg

doi:10.1016/j.jcat.2008.01.004

Ceria-catalyzed soot oxidation studied by environmental transmission electron microscopy

Søren Bredmose Simonsen
, S. Dahl
, E. Johnson
, S. Helveg

Haldor Topsoe AS
University of Copenhagen

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

Environmental transmission electron microscopy (ETEM) was used to monitor in situ ceria-catalyzed oxidation of soot in relation to diesel engine emission control. From time-lapsed ETEM image series of soot particles in contact with CeO2, or with Al2O3 as inert reference, mechanistic and kinetic insight into the catalytic and noncatalytic oxidation mechanisms was obtained. Specifically, the results indicate that the catalytic soot oxidation mechanism involves reaction centers at the soot–CeO2 interface and that the interface reaction kinetic properties are in good agreement with previous macroscopic, averaging measurements.
Keyword: Ceria-based catalysts,Soot oxidation,Diesel exhausts emission control,Environmental transmission electron microscopy

Original language	English
Journal	Journal of Catalysis
Volume	255
Issue number	1
Pages (from-to)	1-5
ISSN	0021-9517
DOIs	https://doi.org/10.1016/j.jcat.2008.01.004
Publication status	Published - 2008
Externally published	Yes

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title = "Ceria-catalyzed soot oxidation studied by environmental transmission electron microscopy",

abstract = "Environmental transmission electron microscopy (ETEM) was used to monitor in situ ceria-catalyzed oxidation of soot in relation to diesel engine emission control. From time-lapsed ETEM image series of soot particles in contact with CeO2, or with Al2O3 as inert reference, mechanistic and kinetic insight into the catalytic and noncatalytic oxidation mechanisms was obtained. Specifically, the results indicate that the catalytic soot oxidation mechanism involves reaction centers at the soot–CeO2 interface and that the interface reaction kinetic properties are in good agreement with previous macroscopic, averaging measurements. Keyword: Ceria-based catalysts,Soot oxidation,Diesel exhausts emission control,Environmental transmission electron microscopy",

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T1 - Ceria-catalyzed soot oxidation studied by environmental transmission electron microscopy

AU - Simonsen, Søren Bredmose

AU - Dahl, S.

AU - Johnson, E.

AU - Helveg, S.

PY - 2008

Y1 - 2008

N2 - Environmental transmission electron microscopy (ETEM) was used to monitor in situ ceria-catalyzed oxidation of soot in relation to diesel engine emission control. From time-lapsed ETEM image series of soot particles in contact with CeO2, or with Al2O3 as inert reference, mechanistic and kinetic insight into the catalytic and noncatalytic oxidation mechanisms was obtained. Specifically, the results indicate that the catalytic soot oxidation mechanism involves reaction centers at the soot–CeO2 interface and that the interface reaction kinetic properties are in good agreement with previous macroscopic, averaging measurements. Keyword: Ceria-based catalysts,Soot oxidation,Diesel exhausts emission control,Environmental transmission electron microscopy

AB - Environmental transmission electron microscopy (ETEM) was used to monitor in situ ceria-catalyzed oxidation of soot in relation to diesel engine emission control. From time-lapsed ETEM image series of soot particles in contact with CeO2, or with Al2O3 as inert reference, mechanistic and kinetic insight into the catalytic and noncatalytic oxidation mechanisms was obtained. Specifically, the results indicate that the catalytic soot oxidation mechanism involves reaction centers at the soot–CeO2 interface and that the interface reaction kinetic properties are in good agreement with previous macroscopic, averaging measurements. Keyword: Ceria-based catalysts,Soot oxidation,Diesel exhausts emission control,Environmental transmission electron microscopy

U2 - 10.1016/j.jcat.2008.01.004

DO - 10.1016/j.jcat.2008.01.004

M3 - Journal article

SN - 0021-9517

VL - 255

SP - 1

EP - 5

JO - Journal of Catalysis

JF - Journal of Catalysis

IS - 1

ER -

Ceria-catalyzed soot oxidation studied by environmental transmission electron microscopy

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