Mechanism of Oxygen Transfer in Layered Lanthanide Nickelates Ln2 − x NiO4 + δ (Ln = La, Pr) and Their Nanocomposites with Ce0.9Gd0.1O2 − δ and Y2(Ti0.8Zr0.2)1.6Mn0.4O7 − δ Solid Electrolytes
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Переводная
|
| Журнал |
Russian Journal of Electrochemistry
ISSN: 1023-1935
, E-ISSN: 1608-3342
|
| Вых. Данные |
Год: 2013,
Том: 49,
Номер: 7,
Страницы: 645-651
Страниц
: 7
DOI:
10.1134/S1023193513070136
|
| Ключевые слова |
diffusion, heteroexchange rate, layered lanthanide nickelates, nanocomposites, oxygen isotopic heteroexchange |
| Авторы |
Sadykov V.A.
1
,
Eremeev N.F.
1
,
Usol'tsev V.V.
1
,
Bobin A.S.
1
,
Alikina G.M.
1
,
Pelipenko V.V.
1
,
Sadovskaya E.M.
1
,
Muzykantov V.S.
1
,
Bulgakov N.N.
1
,
Uvarov N.F.
2
|
| Организации |
| 1 |
Институт катализа им. Г.К. Борескова СО РАН
|
| 2 |
Институт химии твердого тела и механохимии СО РАН
|
|
Информация о финансировании (1)
|
1
|
Министерство образования и науки Российской Федерации
|
14.740.12.1357
|
The mechanism of oxygen transfer in layered nickelates having a Ruddlesden-Popper structure and their nanocomposites with Ce0.9Gd0.1O2 − δ (GDC) and Y2(Ti0.8Zr0.2)1.6Mn0.4O7 − δ (YTZM) solid electrolytes having fluorite and pyrochlore structures were studied by the oxygen isotope heteroexchange method in a flow and static reactor, thermoprogrammed desorption, and semiempirical interacting bonds method. The experimental heteroexchange data were adequately described by assuming that all atoms were equivalent in exchange in the bulk of layered nickelates, which was consistent with the cooperative oxygen migration model with fast exchange between the interstitial and regular positions. Strong interaction between the domains of the nickelate phases and solid electrolytes in nanocomposites, accompanied by a redistribution of cations between the phases, hindered the cooperative oxygen migration and led to a decrease in the diffusion coefficient as the exchange rate increased.