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• W2913426989 abstract "Perovskite-type (ABO3) complex oxides of Sm1-xSrxFe0.7Cr0.3O3-δ (x = 0.5-0.7) series were prepared by a glycine-nitrate combustion process. The crystal structure, oxygen nonstoichiometry, electrical conducting, thermal expansion, and electrocatalytic properties of Sm1-xSrxFe0.7Cr0.3O3-δ perovskites were inspected in view of their use as cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFCs). Changing the content of Sm3+ at the A-site was demonstrated to be effective in tuning the structure and properties. The variation of the various properties with Sm3+ content was explained in relation to the corresponding evolution of the crystal structure and oxygen nonstoichiometry. Sm0.3Sr0.7Fe0.7Cr0.3O3-δ (x = 0.7) was determined to be the optimal composition in the Sm1-xSrxFe0.7Cr0.3O3-δ series based on a trade-off between the thermal expansion and electrocatalytic properties. Sm0.3Sr0.7Fe0.7Cr0.3O3-δ ceramic specimen exhibited an electrical conductivity of approximately 40 S·cm−1 at 800°C and a thermal expansion coefficient of 14.1 × 10−6 K−1 averaged in the temperature range from 40°C to 1000°C. At 800°C in air, Sm0.3Sr0.7Fe0.7Cr0.3O3-δ electrode showed a cathodic polarization resistance of 0.19 Ω·cm2, a cathodic overpotential of 30 mV at current density of 200 mA·cm−2, and an exchange current density of 257 mA·cm−2. It is suggested that Sm0.3Sr0.7Fe0.7Cr0.3O3-δ is a potential candidate material for cathode of IT-SOFCs in light of its overall properties." @default.
• W2913426989 created "2019-02-21" @default.
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• W2913426989 date "2019-02-04" @default.
• W2913426989 modified "2023-10-18" @default.
• W2913426989 title "Property evaluation of <scp> Sm _1‐x Sr _x Fe _0.7 Cr _0.3 O _3‐δ </scp> perovskites as cathodes for intermediate temperature solid oxide fuel cells" @default.
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• W2913426989 doi "https://doi.org/10.1002/er.4377" @default.
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