AI Article Synopsis
- - A new perovskite oxide, SmSrFeTiRuO (SSFTR), has been discovered that serves as a promising symmetrical electrode material, demonstrating strong stability in both reducing and oxidizing environments.
- - SSFTR’s performance is highlighted by a peak power density of 271 mW·cm at 800 °C in wet hydrogen, which improves to 417 mW·cm when utilizing A-site-deficient variants, thanks to the formation of active Ru nanoparticles that enhance electrocatalytic activity.
- - This study suggests that the method of exsolving nanoparticles on electrode surfaces could be a useful strategy for designing high-performance electrodes in symmetrical solid oxide fuel cells (SOFCs) and other electrochemical
Article Abstract
Here, we report a new perovskite oxide with formula SmSrFeTiRuO (SSFTR), which exhibits a great potential as a symmetrical electrode material with satisfying stability in both reducing and oxidizing environments. Moreover, SSFTR exhibits good redox and thermal cycle stability. The electrolyte-supported (SmCeO, SDC) symmetrical cell with SSFTR electrodes possesses a peak power density of 271 mW·cm at 800 °C in wet H. Moreover, the peak power density is remarkably improved to 417 mW·cm when applying A-site-deficient perovskite oxide SmSrFeTiRuO as the symmetrical electrode, benifiting by the in situ-exsolved Ru nanoparticles with excellent electrocatalytic activity, since A-site deficiency can provide additional driving force for the exsolution of B-site cations upon reduction. As an ingenious approach, this exsolution of electrocatalytically active nanoparticles on the surface of electrode may be applicable to the development of other excellent performance electrodes for symmetrical SOFCs and other electrochemical systems.
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