Oxygen mobility and surface ractivity of PrNi1 − xCoxO3+δ–Ce0.9Y0.1O2 − δ cathode nanocomposites

Sadykov; Ivanov, V.; Ulihin, A.; Mertens, Josef; Muzykantov, V.; Brobin, A.; Uvarov, N.; Rogov, V.; Sadovskaya, E.; Belyaev, V.; Ishchenko, A.; Vinke, Izaak C.; Pelipenko, V.; Eremeev, N; Krieger, T.; Alikina, G.; Okhulupin, Yu.

doi:10.1016/j.ssi.2014.01.020

Journal Article

FZJ-2014-01418

Oxygen mobility and surface ractivity of PrNi1 − xCoxO3+δ–Ce0.9Y0.1O2 − δ cathode nanocomposites

Sadykov (Corresponding author) ; Eremeev, N. ; Alikina, G. ; Sadovskaya, E. ; Muzykantov, V. ; Pelipenko, V. ; Brobin, A. ; Krieger, T. ; Belyaev, V. ; Ivanov, V. ; Ishchenko, A. ; Rogov, V. ; Ulihin, A. ; Uvarov, N. ; Okhulupin, Y. ; Mertens, J.FZJ* ; Vinke, I. C.FZJ*

2014
Elsevier Science Amsterdam [u.a.]

Solid state ionics 262, 707–712 (2014) [10.1016/j.ssi.2014.01.020]

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Please use a persistent id in citations: doi:10.1016/j.ssi.2014.01.020

Abstract: Cobalt-doped praseodymiumnickelate PrNi1 − xCoxO3 − δ (PNCx) and Y-doped ceria Ce0.9Y0.1O2 − δ (YDC) oxideswere synthesized via Pechini route. PNCx+YDC composites were prepared via ultrasonic dispersion of the mixtureof perovskite and fluorite nanopowders in isopropanol with addition of polyvinyl butyral followed by drying,pressing and sintering at 1300 °C. The oxygenmobility and reactivity of powdered PNCx and composites obtainedby crushing and milling of dense pellets were estimated by O2-TPD and oxygen isotope exchange with 18O2 andC18O2 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 oxygenmobility and reactivity tend to decrease with Co content. For composites, the oxygenmobility ismuch higher due to Pr transfer into YDC thus disordering perovskite-like and fluorite-like phases. TPIEC18O2 SSITKA experiments combined with SIMS analysis of the depth profiles of Pr18O and Ce18O suggest thatfast 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 theweight relaxation technique exceeds that of well known LSFC–GDC composite.

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