The crystal structure of compositionally homogeneous mixed ceria-zirconia oxides by high resolution X-ray and neutron diffraction methods

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The crystal structure of compositionally homogeneous mixed ceria-zirconia oxides by high resolution X-ray and neutron diffraction methods. / Shmakov, Alexander N.; Cherepanova, Svetlana V.; Zyuzin, Dmitrii A. et al.

In: Open Chemistry, Vol. 15, No. 1, 01.01.2017, p. 438-445.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{9520f74fa1e8475ab8a790181492a9c0,

title = "The crystal structure of compositionally homogeneous mixed ceria-zirconia oxides by high resolution X-ray and neutron diffraction methods",

abstract = "The real/atomic structure of single phase homogeneous nanocrystalline Ce0.5Zr0.5O2±δ oxides prepared by a modified Pechini route and Ni-loaded catalysts of methane dry reforming on their bases was studied by a combination of neutron diffraction, synchrotron X-ray diffraction, total X-ray scattering and X-ray absorption spectroscopy. The effects of sintering temperature and pretreatment in H2 were elucidated. The structure of the mixed oxides corresponds to a tetragonal space group indicating a homogeneous distribution of Ce and Zr cations in the lattice. A pronounced disordering of the oxygen sublattice was revealed by neutron diffraction, supposedly due to incorporation of water into the structure when in contact with air promoted by the generation of anion vacancies in the lattice after reduction or calcination at high temperatures. However, such disordering has not resulted in any occupation of the oxygen interstitial positions in the bulk of the nanodomains.",

keywords = "Disordering, Mixed ceria-zirconia oxides, Neutron and X-ray diffraction studies, Real/atomic structure, DEFECTS, STATION, disordering, NANOCRYSTALLINE, neutron and X-ray diffraction studies, real/atomic structure, METHANE, mixed ceria-zirconia oxides, POWDER DIFFRACTION, OXYGEN STORAGE CAPACITY, CATALYSTS",

author = "Shmakov, {Alexander N.} and Cherepanova, {Svetlana V.} and Zyuzin, {Dmitrii A.} and Fedorova, {Yulia E.} and Bobrikov, {Ivan A.} and Roger, {Anne Cecile} and Andrzej Adamski and Sadykov, {Vladislav A.}",

year = "2017",

month = jan,

day = "1",

doi = "10.1515/chem-2017-0044",

language = "English",

volume = "15",

pages = "438--445",

journal = "Open Chemistry",

issn = "2391-5420",

publisher = "Walter de Gruyter GmbH",

number = "1",

}

RIS

TY - JOUR

T1 - The crystal structure of compositionally homogeneous mixed ceria-zirconia oxides by high resolution X-ray and neutron diffraction methods

AU - Shmakov, Alexander N.

AU - Cherepanova, Svetlana V.

AU - Zyuzin, Dmitrii A.

AU - Fedorova, Yulia E.

AU - Bobrikov, Ivan A.

AU - Roger, Anne Cecile

AU - Adamski, Andrzej

AU - Sadykov, Vladislav A.

PY - 2017/1/1

Y1 - 2017/1/1

N2 - The real/atomic structure of single phase homogeneous nanocrystalline Ce0.5Zr0.5O2±δ oxides prepared by a modified Pechini route and Ni-loaded catalysts of methane dry reforming on their bases was studied by a combination of neutron diffraction, synchrotron X-ray diffraction, total X-ray scattering and X-ray absorption spectroscopy. The effects of sintering temperature and pretreatment in H2 were elucidated. The structure of the mixed oxides corresponds to a tetragonal space group indicating a homogeneous distribution of Ce and Zr cations in the lattice. A pronounced disordering of the oxygen sublattice was revealed by neutron diffraction, supposedly due to incorporation of water into the structure when in contact with air promoted by the generation of anion vacancies in the lattice after reduction or calcination at high temperatures. However, such disordering has not resulted in any occupation of the oxygen interstitial positions in the bulk of the nanodomains.

AB - The real/atomic structure of single phase homogeneous nanocrystalline Ce0.5Zr0.5O2±δ oxides prepared by a modified Pechini route and Ni-loaded catalysts of methane dry reforming on their bases was studied by a combination of neutron diffraction, synchrotron X-ray diffraction, total X-ray scattering and X-ray absorption spectroscopy. The effects of sintering temperature and pretreatment in H2 were elucidated. The structure of the mixed oxides corresponds to a tetragonal space group indicating a homogeneous distribution of Ce and Zr cations in the lattice. A pronounced disordering of the oxygen sublattice was revealed by neutron diffraction, supposedly due to incorporation of water into the structure when in contact with air promoted by the generation of anion vacancies in the lattice after reduction or calcination at high temperatures. However, such disordering has not resulted in any occupation of the oxygen interstitial positions in the bulk of the nanodomains.

KW - Disordering

KW - Mixed ceria-zirconia oxides

KW - Neutron and X-ray diffraction studies

KW - Real/atomic structure

KW - DEFECTS

KW - STATION

KW - disordering

KW - NANOCRYSTALLINE

KW - neutron and X-ray diffraction studies

KW - real/atomic structure

KW - METHANE

KW - mixed ceria-zirconia oxides

KW - POWDER DIFFRACTION

KW - OXYGEN STORAGE CAPACITY

KW - CATALYSTS

UR - http://www.scopus.com/inward/record.url?scp=85052018433&partnerID=8YFLogxK

U2 - 10.1515/chem-2017-0044

DO - 10.1515/chem-2017-0044

M3 - Article

AN - SCOPUS:85052018433

VL - 15

SP - 438

EP - 445

JO - Open Chemistry

JF - Open Chemistry

SN - 2391-5420

IS - 1

ER -

ID: 16104382