Three dimensional cyclic trinuclear units based metal-covalent organic frameworks for electrochemical CO 2 RR.

A three-dimensional metal-covalent organic framework (3D-MCOF) based on cyclic trinuclear units was synthesized using organic tetrahedral linkers and copper-based cyclic trinuclear complexes. The novel type of 3D-MCOF, named 3D-CTU-MCOF, with the ctn topology, is reported herein for the first time. Our study demonstrated enhanced electrocatalytic capacity for CO 2 reduction reaction of 3D-CTU-MCOF compared to independent cyclic trinuclear units.