S‐Scheme Co 9 S 8 @Cd 0.8 Zn 0.2 S‐DETA Hierarchical Nanocages Bearing Organic CO 2 Activators for Photocatalytic Syngas Production

Abstract Delicate modulations of CO 2 activation and charge carrier separation/migration are challenging, yet imperative to augment CO 2 photoreduction efficiency. Herein, by supporting diethylenetriamine (DETA)‐functionalized Cd 0.8 Zn 0.2 S nanowires on the exterior surface of hollow Co 9 S 8 polyhedrons, hierarchical Co 9 S 8 @Cd 0.8 Zn 0.2 S‐DETA nanocages are fabricated as an S‐scheme photocatalyst for reducing CO 2 and protons to produce syngas (CO and H 2 ). The amine groups strengthen adsorption and activation of CO 2 , while the “nanowire‐on‐nanocage” hierarchical hollow heterostructure with an S‐scheme interface boosts separation and transfer of photoinduced charges. Employing Co(bpy) 3 2+ as a…