Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Oxygen mobility and surface reactivity of PrNi1-xCoxO3-δ perovskites and their nanocomposites with Ce0.9Y0.1O2-δ by temperature-programmed isotope exchange experiments. / Sadykov, V.; Eremeev, N.; Sadovskaya, E. и др.
в: Solid State Ionics, Том 273, 13538, 01.05.2015, стр. 35-40.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Oxygen mobility and surface reactivity of PrNi1-xCoxO3-δ perovskites and their nanocomposites with Ce0.9Y0.1O2-δ by temperature-programmed isotope exchange experiments
AU - Sadykov, V.
AU - Eremeev, N.
AU - Sadovskaya, E.
AU - Bobina, A.
AU - Ishchenko, A.
AU - Pelipenko, V.
AU - Muzykantov, V.
AU - Krieger, T.
AU - Amanbaeva, D.
PY - 2015/5/1
Y1 - 2015/5/1
N2 - Cobalt-doped praseodimium nickelates PrNi1 - xCoxO3 - δ and Y/(Pr, Y)-doped ceria oxides were synthesized via Pechini route. Nanocomposites were prepared via ultrasonic dispersion of the mixture of perovskite and fluorite nanopowders in isopropanol with addition of polyvinyl butyral followed by drying, pressing and sintering at 1000-1100°C. The oxygen mobility and reactivity of perovskites, fluorites and powdered composites obtained by crushing and milling of pellets were estimated by oxygen isotope heteroexchange with 18O2 and C18O2 using both closed and flow (SSITKA) reactors in the temperature-programmed (TPIE) mode. Co-existence of two routes of oxygen bulk diffusion-the fast one and the slow one in perovskites and composites was revealed. In perovskites, the fast oxygen diffusion is aminor channel related to some defects in their structure. In composites, the fast oxygen diffusion is the main route being related to both phases disordered due to cation redistribution between them, first of all, to fluorite-like domains of Pr,Y-doped ceria and perovskite/fluorite interfaces.
AB - Cobalt-doped praseodimium nickelates PrNi1 - xCoxO3 - δ and Y/(Pr, Y)-doped ceria oxides were synthesized via Pechini route. Nanocomposites were prepared via ultrasonic dispersion of the mixture of perovskite and fluorite nanopowders in isopropanol with addition of polyvinyl butyral followed by drying, pressing and sintering at 1000-1100°C. The oxygen mobility and reactivity of perovskites, fluorites and powdered composites obtained by crushing and milling of pellets were estimated by oxygen isotope heteroexchange with 18O2 and C18O2 using both closed and flow (SSITKA) reactors in the temperature-programmed (TPIE) mode. Co-existence of two routes of oxygen bulk diffusion-the fast one and the slow one in perovskites and composites was revealed. In perovskites, the fast oxygen diffusion is aminor channel related to some defects in their structure. In composites, the fast oxygen diffusion is the main route being related to both phases disordered due to cation redistribution between them, first of all, to fluorite-like domains of Pr,Y-doped ceria and perovskite/fluorite interfaces.
KW - Co-doped praseodimium nickelate
KW - Isotope exchange
KW - Mixed ionic-electronic conducting nanocomposites
KW - Oxygen diffusion
KW - Surface reactivity
KW - Y-doped ceria
UR - http://www.scopus.com/inward/record.url?scp=84937645262&partnerID=8YFLogxK
U2 - 10.1016/j.ssi.2014.11.021
DO - 10.1016/j.ssi.2014.11.021
M3 - Article
AN - SCOPUS:84937645262
VL - 273
SP - 35
EP - 40
JO - Solid State Ionics
JF - Solid State Ionics
SN - 0167-2738
M1 - 13538
ER -
ID: 25396526