Orbital Coupling‐Engineered Coordination‐Unsaturated CuAg Nanochains Drives Spontaneous Electrocatalytic Acetylene Semihydrogenation and Zn‐C 2 H 2 Batteries

, showcasing dual functionality in electrosynthesis and energy storage. Our work establishes a paradigm for coordination unsaturated bimetallic catalyst design through orbital coupling engineering, providing atomic-level insights into proton-mediated reaction control for sustainable chemical manufacturing.