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• W2912930021 abstract "In this study, dense La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) electrodes decorated with the novel hetero-structured ceramic oxide mixture in four different ratios of Ce0.8Gd0.2O2-δ (GDC) and La2Mo2O9 (LMO). The time-dependent conductivity transients were acquire using electrical conductivity relaxation (ECR) technique at a chosen conditions of temperature in the range of 650–850 °C and instantaneous pO2 step change between 0.2 and 0.8. Fitting of time-dependent conductivity to the appropriate non-equilibrium solutions of Fick's diffusion equation has yielded the chemical diffusion coefficient, Dchem, and oxygen surface exchange coefficient, kchem. As expected, the Dchem of the coated samples remained invariant, whilst the kchem is found to vary with the change in GDC-LMO coating mixture ratio. Substantial increase of a factor of 10 in the surface exchange coefficient is noticed for the LSCF coated with a 1:0.75 mixing ratio as compared to bare sample at 850 °C. The enhancement in kchem is attributed to the optimal triple-phase boundary (TPB) regions which promotes oxygen surface exchange kinetics. Thus, coating of selective ratio of hetero-structured oxide in a form of nano-particulate layer over the LSCF surface is considered to be a promising candidate for solid oxide fuel cell (SOFC) cathode." @default.
• W2912930021 created "2019-02-21" @default.
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• W2912930021 date "2019-03-01" @default.
• W2912930021 modified "2023-10-18" @default.
• W2912930021 title "Effect of hetero-structured nano-particulate coating on the oxygen surface exchange properties of La0.6Sr0.4Co0.2Fe0.8O3-δ" @default.
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• W2912930021 doi "https://doi.org/10.1016/j.ijhydene.2019.01.107" @default.
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