1 research outputs found
Cobalt-Modified Covalent Organic Framework as a Robust Water Oxidation Electrocatalyst
The
development of stable, efficient oxygen evolution reaction
(OER) catalyst capable of oxidizing water is one of the premier challenges
in the conversion of solar energy to electrical energy, because of
its poor kinetics. Herein, a bipyridine-containing covalent organic
framework (TpBpy) is utilized as an OER catalyst by way of engineering
active CoÂ(II) ions into its porous framework. The as-obtained Co-TpBpy
retains a highly accessible surface area (450 m<sup>2</sup>/g) with
exceptional stability, even after 1000 cycles and 24 h of OER activity
in phosphate buffer under neutral pH conditions with an overpotential
of 400 mV at a current density of 1 mA/cm<sup>2</sup>. The unusual
catalytic stability of Co-TpBpy arises from the synergetic effect
of the inherent porosity and presence of coordinating units in the
COF skeleton