2D Microporous Covalent Organic Frameworks as Cobalt Nanoparticle Supports for Electrocatalytic Hydrogen Evolution Reaction

Covalent organic frameworks (COFs) are a new class of porous crystalline polymers, which considered to be excellent supports for metal nanoparticles (MNPs) due their highly ordered structure, chemical tunability, and porosity. In this work, two novel ultra-microporous COFs, JUC−624 JUC−625, with narrow pore size distribution have been synthesized used the confined growth ultrafine Co (CoNPs) high loading. an alkaline environment, produced materials were investigated as electrocatalysts hydrogen evolution reaction (HER). Electrochemical test results show that CoNPs@COFs Tafel slope 84 mV·dec−1, onset overpotential 105 mV, ideal stability. Remarkably, CoNPs@JUC−625 required only 146 mV afford current density 10 mA cm−2. This research will open up avenues making COF-supported MNPs good dispersity stability extensive applications.