Reduction of a Ni/Spinel Catalyst for Methane Reforming

Jan Kehres; Jens Wenzel Andreasen; Jostein Bø Fløystad; Haihua Liu; Alfons Molenbroek; Jon Geest Jakobsen; Ib Chorkendorff; Jane Hvolbæk Nielsen; Kristin Høydalsvik; Dag Werner Breiby; Tejs Vegge

doi:10.1021/jp510159m

Reduction of a Ni/Spinel Catalyst for Methane Reforming

Jan Kehres, Jens Wenzel Andreasen, Jostein Bø Fløystad, Haihua Liu, Alfons Molenbroek, Jon Geest Jakobsen, Ib Chorkendorff, Jane Hvolbæk Nielsen, Kristin Høydalsvik, Dag Werner Breiby, Tejs Vegge

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Abstract

A nickel/spinel (Ni/MgAl2O4) catalyst, w(Ni) = 22 wt%, was investigated in situ during reduction with wide angle X-ray scattering (WAXS) in a laboratory setup and with anomalous small angle X-ray scattering (ASAXS) at a synchrotron source. Complementary high resolution transmission electron microscopy (HRTEM) was performed on the fresh catalyst sample. The Ni particles in the fresh catalyst sample were observed to exhibit a Ni/NiO core/shell structure. A decrease of the Ni lattice parameter is observed during the reduction in a temperature interval from 413 – 453 K, which can be related to the reduction of the NiO shell, whereby stress due to the lattice mismatch of Ni and NiO is relieved.

Original language	English
Journal	The Journal of Physical Chemistry Part C
Volume	119
Issue number	3
Pages (from-to)	1424–1432
ISSN	1932-7447
DOIs	https://doi.org/10.1021/jp510159m
Publication status	Published - 2015

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title = "Reduction of a Ni/Spinel Catalyst for Methane Reforming",

abstract = "A nickel/spinel (Ni/MgAl2O4) catalyst, w(Ni) = 22 wt%, was investigated in situ during reduction with wide angle X-ray scattering (WAXS) in a laboratory setup and with anomalous small angle X-ray scattering (ASAXS) at a synchrotron source. Complementary high resolution transmission electron microscopy (HRTEM) was performed on the fresh catalyst sample. The Ni particles in the fresh catalyst sample were observed to exhibit a Ni/NiO core/shell structure. A decrease of the Ni lattice parameter is observed during the reduction in a temperature interval from 413 – 453 K, which can be related to the reduction of the NiO shell, whereby stress due to the lattice mismatch of Ni and NiO is relieved.",

author = "Jan Kehres and Andreasen, {Jens Wenzel} and Fl{\o}ystad, {Jostein B{\o}} and Haihua Liu and Alfons Molenbroek and Jakobsen, {Jon Geest} and Ib Chorkendorff and Nielsen, {Jane Hvolb{\ae}k} and Kristin H{\o}ydalsvik and Breiby, {Dag Werner} and Tejs Vegge",

year = "2015",

doi = "10.1021/jp510159m",

language = "English",

volume = "119",

pages = "1424–1432",

journal = "The Journal of Physical Chemistry Part C",

issn = "1932-7447",

publisher = "American Chemical Society",

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TY - JOUR

T1 - Reduction of a Ni/Spinel Catalyst for Methane Reforming

AU - Kehres, Jan

AU - Andreasen, Jens Wenzel

AU - Fløystad, Jostein Bø

AU - Liu, Haihua

AU - Molenbroek, Alfons

AU - Jakobsen, Jon Geest

AU - Chorkendorff, Ib

AU - Nielsen, Jane Hvolbæk

AU - Høydalsvik, Kristin

AU - Breiby, Dag Werner

AU - Vegge, Tejs

PY - 2015

Y1 - 2015

N2 - A nickel/spinel (Ni/MgAl2O4) catalyst, w(Ni) = 22 wt%, was investigated in situ during reduction with wide angle X-ray scattering (WAXS) in a laboratory setup and with anomalous small angle X-ray scattering (ASAXS) at a synchrotron source. Complementary high resolution transmission electron microscopy (HRTEM) was performed on the fresh catalyst sample. The Ni particles in the fresh catalyst sample were observed to exhibit a Ni/NiO core/shell structure. A decrease of the Ni lattice parameter is observed during the reduction in a temperature interval from 413 – 453 K, which can be related to the reduction of the NiO shell, whereby stress due to the lattice mismatch of Ni and NiO is relieved.

AB - A nickel/spinel (Ni/MgAl2O4) catalyst, w(Ni) = 22 wt%, was investigated in situ during reduction with wide angle X-ray scattering (WAXS) in a laboratory setup and with anomalous small angle X-ray scattering (ASAXS) at a synchrotron source. Complementary high resolution transmission electron microscopy (HRTEM) was performed on the fresh catalyst sample. The Ni particles in the fresh catalyst sample were observed to exhibit a Ni/NiO core/shell structure. A decrease of the Ni lattice parameter is observed during the reduction in a temperature interval from 413 – 453 K, which can be related to the reduction of the NiO shell, whereby stress due to the lattice mismatch of Ni and NiO is relieved.

U2 - 10.1021/jp510159m

DO - 10.1021/jp510159m

M3 - Journal article

SN - 1932-7447

VL - 119

SP - 1424

EP - 1432

JO - The Journal of Physical Chemistry Part C

JF - The Journal of Physical Chemistry Part C

IS - 3

ER -

Reduction of a Ni/Spinel Catalyst for Methane Reforming

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