College of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, China.
Fujian College Association Instrumental Analysis Center, Fuzhou University, Fuzhou, Fujian 350108, China.
ACS Appl Mater Interfaces. 2023 Feb 15;15(6):8138-8148. doi: 10.1021/acsami.2c21172. Epub 2023 Jan 31.
Nanostructured air electrodes play a crucial role in improving the electrocatalytic activity of oxygen reduction and evolution reactions in solid oxide cells (SOCs). Herein, we report the fabrication of a nanostructured BaCoO-decorated cation-deficient PrBaCaCoO (PBCC) air electrode via a combined modification and direct assembly approach. The modification approach endows the dual-phase air electrode with a large surface area and abundant oxygen vacancies. An intimate air electrode-electrolyte interface is constructed with the formation of a catalytically active CoO bridging layer via electrochemical polarization. The corresponding single cell exhibits a peak power density of 2.08 W cm, an electrolysis current density of 1.36 A cm at 1.3 V, and a good operating stability at 750 °C for 100 h. This study provides insights into the rational design and facile utilization of an active and stable nanostructured air electrode of SOCs.
纳米结构空气电极在提高固体氧化物燃料电池（SOC）中氧还原和析氧反应的电催化活性方面发挥着关键作用。在此，我们通过组合修饰和直接组装的方法，报告了一种纳米结构化 BaCoO 修饰的阳离子缺陷型 PrBaCaCoO（PBCC）空气电极的制备。修饰方法赋予了双相空气电极大的表面积和丰富的氧空位。通过电化学极化形成了催化活性的 CoO 桥接层，构建了紧密的空气电极-电解质界面。相应的单电池在 750°C 下具有 2.08 W cm 的峰值功率密度、1.36 A cm 的电解电流密度和 100 h 的良好运行稳定性。本研究为 SOC 活性和稳定的纳米结构化空气电极的合理设计和简便利用提供了思路。
