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- W4288809183 abstract "Effective electrode materials play a key role to enhance electrochemical performances of symmetric solid oxide electrolysis cells (SSOECs). Herein, “exsolution effect” of perovskite oxide at high temperature and reducing atmosphere is introduced. As a proof, La0.6Sr0.4Fe0.8Ni0.2O3-δ(LSFN) perovskite decorated with in-situ exsolved Ni-Fe alloy nanoparticles is reported as electrode materials of SSOECs. XRD, SEM, TEM, and XPS characterizations prove the formation of Ni-Fe alloy. The as-prepared SSOECs deliver improved electrochemical performances for both steam electrolysis (50%H2O/50%H2) and co-electrolysis (50%H2O/40%CO2/10%H2), current densities of 0.64 and 0.67 A·cm−2 are obtained at 1.3 V and 800°C, respectively. Electrochemical impedance spectroscopy (EIS) and distribution of relaxation time (DRT) analysis show that the in-situ formed Ni-Fe nanoparticles can provide a new reaction path for water/hydrogen half-reaction, and electrochemical activity and kinetics of oxygen evolution reaction (OER) can be significantly enhanced by RP type perovskite oxide after re-oxidation treatment. Moreover, the SSOECs successfully runs for 60 h at 1.2 V without obvious performance degradation." @default.
- W4288809183 created "2022-07-30" @default.
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- W4288809183 date "2022-12-01" @default.
- W4288809183 modified "2023-09-29" @default.
- W4288809183 title "La0.6Sr0.4Fe0.8Ni0.2O3-δ perovskite with in-situ exsolved Ni-Fe nanoparticles as high activity catalyst for symmetric solid oxide electrolysis cells" @default.
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- W4288809183 doi "https://doi.org/10.1016/j.materresbull.2022.111984" @default.
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