Energy-filtered environmental transmission electron microscopy for the assessment of solid-gas reactions at elevated temperature: NiO/YSZ-H2 as a case study

Q. Jeangros; Thomas Willum Hansen; Jakob Birkedal Wagner; Rafal E. Dunin-Borkowski; C. Hébert; J. Van herle; A. Hessler-Wyser

doi:10.1016/j.ultramic.2016.06.005

Energy-filtered environmental transmission electron microscopy for the assessment of solid-gas reactions at elevated temperature: NiO/YSZ-H₂ as a case study

Q. Jeangros, Thomas Willum Hansen, Jakob Birkedal Wagner, Rafal E. Dunin-Borkowski, C. Hébert, J. Van herle, A. Hessler-Wyser

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Abstract

A novel approach, which is based on the analysis of sequences of images recorded using energy-filtered transmission electron microscopy and can be used to assess the reaction of a solid with a gas at elevated temperature, is illustrated for the reduction of a NiO/ceramic solid oxide fuel cell anode in 1.3mbar of H₂. Three-window elemental maps and jump-ratio images of the O K edge and total inelastic mean free path images are recorded as a function of temperature and used to provide local and quantitative information about the reaction kinetics and the volume changes that result from the reaction. Under certain assumptions, the speed of progression of the reaction front in all three dimensions is obtained, thereby providing a three-dimensional understanding of the reaction.

Original language	English
Journal	Ultramicroscopy
Volume	169
Pages (from-to)	11-21
Number of pages	11
ISSN	0304-3991
DOIs	https://doi.org/10.1016/j.ultramic.2016.06.005
Publication status	Published - 2016

Keywords

Environmental transmission electron microscopy
Energy-filtered transmission electron microscopy
Solid oxide fuel cells
Reduction
Reaction mechanisms

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10.1016/j.ultramic.2016.06.005

Jeangros et alAccepted author manuscript, 2.13 MBLicence: CC BY-NC-ND

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title = "Energy-filtered environmental transmission electron microscopy for the assessment of solid-gas reactions at elevated temperature: NiO/YSZ-H2 as a case study",

abstract = "A novel approach, which is based on the analysis of sequences of images recorded using energy-filtered transmission electron microscopy and can be used to assess the reaction of a solid with a gas at elevated temperature, is illustrated for the reduction of a NiO/ceramic solid oxide fuel cell anode in 1.3mbar of H2. Three-window elemental maps and jump-ratio images of the O K edge and total inelastic mean free path images are recorded as a function of temperature and used to provide local and quantitative information about the reaction kinetics and the volume changes that result from the reaction. Under certain assumptions, the speed of progression of the reaction front in all three dimensions is obtained, thereby providing a three-dimensional understanding of the reaction. ",

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author = "Q. Jeangros and Hansen, {Thomas Willum} and Wagner, {Jakob Birkedal} and Dunin-Borkowski, {Rafal E.} and C. H{\'e}bert and {Van herle}, J. and A. Hessler-Wyser",

year = "2016",

doi = "10.1016/j.ultramic.2016.06.005",

language = "English",

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AU - Jeangros, Q.

AU - Hansen, Thomas Willum

AU - Wagner, Jakob Birkedal

AU - Dunin-Borkowski, Rafal E.

AU - Hébert, C.

AU - Van herle, J.

AU - Hessler-Wyser, A.

PY - 2016

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AB - A novel approach, which is based on the analysis of sequences of images recorded using energy-filtered transmission electron microscopy and can be used to assess the reaction of a solid with a gas at elevated temperature, is illustrated for the reduction of a NiO/ceramic solid oxide fuel cell anode in 1.3mbar of H2. Three-window elemental maps and jump-ratio images of the O K edge and total inelastic mean free path images are recorded as a function of temperature and used to provide local and quantitative information about the reaction kinetics and the volume changes that result from the reaction. Under certain assumptions, the speed of progression of the reaction front in all three dimensions is obtained, thereby providing a three-dimensional understanding of the reaction.

KW - Environmental transmission electron microscopy

KW - Energy-filtered transmission electron microscopy

KW - Solid oxide fuel cells

KW - Reduction

KW - Reaction mechanisms

U2 - 10.1016/j.ultramic.2016.06.005

DO - 10.1016/j.ultramic.2016.06.005

M3 - Journal article

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VL - 169

SP - 11

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JO - Ultramicroscopy

JF - Ultramicroscopy

SN - 0304-3991

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