In Situ Self‐Assembled Active and Stable Ir@MnO<sub>x</sub>/La<sub>0.7</sub>Sr<sub>0.3</sub>Cr<sub>0.9</sub>Ir<sub>0.1</sub>O<sub>3−δ</sub> Interfaces for CO<sub>2</sub> Electrolysis
Yuxiang Shen, Shuo Wang, Rongtan Li, Houfu Lv, Houfu Lv, Mingrun Li, Na Ta, Xiaomin Zhang, Yuefeng Song, Qiang Fu, Guoxiong Wang, Xinhe Bao
Abstract
Abstract Solid oxide electrolysis cells are prospective approaches for CO 2 utilization but face significant challenges due to the sluggish reaction kinetics and poor stability of the fuel electrodes. Herein, we strategically addressed the long‐standing trade‐off phenomenon between enhanced exsolution and improved structural stability via topotactic ion exchange. The surface dynamic reconstruction of the MnO x /La 0.7 Sr 0.3 Cr 0.9 Ir 0.1 O 3−δ (LSCIr) catalyst was visualized at the atomic scale. Compared with the Ir@LSCIr interface, the in situ self‐assembled Ir@MnO x /LSCIr interface exhibited greater CO 2 activation and easily removable carbonate intermediates, thus reached a 42 % improvement in CO 2 electrolysis performance at 1.6 V. Furthermore, an improved CO 2 electrolysis stability was achieved due to the uniformly wrapped MnO x shell of the Ir@MnO x /LSCIr cathode. Our approach enables a detailed understanding of the dynamic microstructure evolution at active interfaces and provides a roadmap for the rational design and evaluation of efficient metal/oxide catalysts for CO 2 electrolysis.