Protonic ceramic fuel cells (PCFCs) hold potential for sustainable energy conversion, yet their widespread application is hindered by the sluggish kinetics and inferior stability of cathode materials. Here, a facile and efficient reverse atom capture technique is developed to manipulate the surface chemistry of PrBa_0.5Sr_0.5Co_1.5Fe_0.5O_5+δ (PBSCF) cathode for PCFCs. This method successfully captures segregated Ba and Sr cations on the PBSCF surface using W species, creating a (Ba/Sr)(Co/Fe/W)O_3−δ (BSCFW)@PBSCF heterostructure. Benefiting from enhanced kinetics of proton-involved oxygen reduction reaction and strengthened chemical stability, the single cell using the optimized 2W-PBSCF cathode demonstrates an exceptional peak power density of 1.32 W cm⁻² at 650 °C and maintains durable performance for 240 h. Theoretical calculations unveil that the BSCFW perovskite delivers lower oxygen vacancy formation energy, hydration energy, and proton transfer energy compared to the PBSCF perovskite. This protocol offers new insights into advanced atom capture techniques for sustainable energy infrastructures.

中文翻译：

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钙钛矿表面的反向原子捕获为质子陶瓷燃料电池提供坚固高效的阴极

质子陶瓷燃料电池（PCFC）具有可持续能源转换的潜力，但其广泛应用受到阴极材料缓慢的动力学和较差的稳定性的阻碍。在此，开发了一种简便有效的反向原子捕获技术来操纵PCFC的 PrBa _0.5 Sr _0.5 Co _1.5 Fe _0.5 O _{5+ δ} (PBSCF) 阴极的表面化学。该方法使用 W 物种成功捕获 PBSCF 表面上分离的 Ba 和 Sr 阳离子，创建 (Ba/Sr)(Co/Fe/W)O _{3− δ} (BSCFW)@PBSCF 异质结构。受益于质子参与的氧还原反应动力学的增强和化学稳定性的增强，使用优化的2W-PBSCF阴极的单电池在650°C下表现出1.32 W cm ^-2的出色峰值功率密度，并保持240小时的耐用性能。理论计算表明，与 PBSCF 钙钛矿相比，BSCFW 钙钛矿具有较低的氧空位形成能、水合能和质子转移能。该协议为可持续能源基础设施的先进原子捕获技术提供了新的见解。