Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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. и др.
в: Open Chemistry, Том 15, № 1, 01.01.2017, стр. 438-445.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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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