Oxygen Mobility and Surface Reactivity of PrNi1 − xCoxO3+δ–Ce0.9Y0.1O2 − δ Cathode Nanocomposites
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Conference |
The 19th International Conference on Solid State Ionics (SSI-19)
02-07 Jun 2013
,
Kyoto
|
| Journal |
Solid State Ionics
ISSN: 0167-2738
|
| Output data |
Year: 2014,
Volume: 262,
Pages: 707-712
Pages count
: 6
DOI:
10.1016/j.ssi.2014.01.020
|
| Tags |
Co-doped praseodymium nickelate, Isotope exchange, Mixed ionic-electronic conducting nanocomposites, Oxygen diffusion, Surface reactivity, Y-doped ceria |
| Authors |
Sadykov V.
1,2
,
Eremeev N.
1
,
Alikina G.
1
,
Sadovskaya E.
1
,
Muzykantov V.
1
,
Pelipenko V.
1
,
Bobin A.
1
,
Krieger T.
1
,
Belyaev V.
1
,
Ivanov V.
1
,
Ishchenko A.
1
,
Rogov V.
1,2
,
Ulikhin A.
3
,
Uvarov N.
3
,
Okhlupin Yu.
3
,
Mertens J.
4
,
Vinke I.
4
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis SB RAS, Lavrentieva av., 5, 630090, Russia
|
| 2 |
Novosibirsk State University, Novosibirsk, Russia
|
| 3 |
Institute of Solid State Chemistry and Mechanochemistry SB RAS, Kutateladze str., 5, 630128, Russi
|
| 4 |
Institute of Energy and Climate Research, Forschungszentrum Julich GmbH, Julich, Germany
|
|
Cobalt-doped praseodymium nickelate PrNi1 − xCoxO3 − δ (PNCx) and Y-doped ceria Ce0.9Y0.1O2 − δ (YDC) oxides were synthesized via Pechini route. PNCx + YDC composites 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 1300 °C. The oxygen mobility and reactivity of powdered PNCx and composites obtained by crushing and milling of dense pellets were estimated by O2-TPD and oxygen isotope exchange with 18O2 and C18O2 using both static and flow (SSITKA) reactors in isothermal and temperature-programmed (TPIE) modes. For PNCx samples sintered at 1300 °C comprised of (Ni,Co)O and Ruddlesden–Popper type phases (Pr2NiO4, Pr4(Ni,Co)3O10), the oxygen mobility and reactivity tend to decrease with Co content. For composites, the oxygen mobility is much higher due to Pr transfer into YDC thus disordering perovskite-like and fluorite-like phases. TPIE C18O2 SSITKA experiments combined with SIMS analysis of the depth profiles of Pr18O and Ce18O suggest that fast oxygen diffusion in composites is provided by domains of disordered perovskite-like phases as well as Pr,Y-doped ceria. For best composites, the value of the oxygen chemical diffusion coefficient estimated by the weight relaxation technique exceeds that of well known LSFC–GDC composite.