Compressed Co–O Bonds Resist Chlorine Corrosion to Enhance the Stability of Chlorine‐Involved Anodic Reactions

Abstract Chlorine (Cl)‐involved anodic reactions are essential for green manufacturing, whereas electrocatalysts suffer from deactivation due to Cl corrosion. Here, a Co 3 O 4 /SnO 2 heterostructure with a shortened Co–O bond is designed to increase structural stability. The combined results of electrochemical measurements and in situ Raman spectroscopy reveal that the deactivation of Co 3 O 4 involves the coordination of Cl to Co sites due to the dynamic evolution of lattice oxygen during the lattice oxygen mechanism (LOM). The compressed Co–O bond of Co 3 O 4 /SnO 2 leads to a restrained LOM, thus resisting Cl‐triggered corrosion. Therefore, Co 3 O 4 /SnO 2 not only realizes the gram‐scale synthesis of epoxides through the Cl‐mediated method via stable and continuous electrocatalysis processes but is also suitable for other anodic chlorination reactions with enhanced durability. This work provides a facile way to prevent Cl corrosion by hindering LOM.