The Crystal Structure of Compositionally Homogeneous Mixed Ceria-Zirconia Oxides by High Resolution X-Ray and Neutron Diffraction Methods
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Open Chemistry
ISSN: 2391-5420
|
| Вых. Данные |
Год: 2017,
Том: 15,
Номер: 1,
Страницы: 438-445
Страниц
: 8
DOI:
10.1515/chem-2017-0044
|
| Ключевые слова |
mixed ceria-zirconia oxides; neutron and X-ray diffraction studies; real/atomic structure; disordering |
| Авторы |
Shmakov Alexander N.
1,2
,
Cherepanova Svetlana V.
1,2
,
Zyuzin Dmitrii A.
1
,
Fedorova Yulia E.
1
,
Bobrikov Ivan A.
3
,
Roger Anne-Cecile
4
,
Adamski Andrzej
5
,
Sadykov Vladislav A.
1,2
|
| Организации |
| 1 |
Boreskov Institute of Catalysis, Novosibirsk, 630090, Russia
|
| 2 |
Novosibirsk State University, Novosibirsk, 630090, Russia
|
| 3 |
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia
|
| 4 |
University of Strasbourg, Strasbourg, F-67087, France
|
| 5 |
Jagiellonian University, Krakow, Poland
|
|
Информация о финансировании (2)
|
1
|
Министерство образования и науки Российской Федерации
|
14.616.21.0036
|
|
2
|
European Commission
|
ERA.Net RUS Plus - NICE
|
The real/atomic structure of single phase homogeneous nanocrystalline Ce0.5Zr0.5O2 +/- delta 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 H-2 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.