Modulating the direction of catalytic glyoximate sites of covalent organic frameworks towards electrocatalytic nitrate reduction.

ABSTRACT: Two-dimensional (2D) covalent organic frameworks (COFs) with metal centers are ideal templates to construct electrocatalysts due to their high degree of structural controllability. However, the metal centers are stacked in columns with limited space, which impedes the mass delivered to catalytic sites across the pore channels. Herein, we demonstrate a topologic synthesis strategy for constructing catalytic sites in three-dimensional (3D) space. The designed 3D COF adopts an ffc topology, with a large space of 1.15 and 1.53 nm between the metal sites along the parallel and vertical directions, respectively. In situ spectroscopy revealed that ∼100% Ni-N₄ sites in 3D frameworks were reconstructed to Ni-N₄-NO, while the reconstruction proportion of Ni-N

SUBMITTER: Yang S 

PROVIDER: S-EPMC12315718 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature