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 utiliz...

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Published in:Chemistry of materials 2016-06, Vol.28 (12), p.4375-4379
Main Authors: Aiyappa, Harshitha Barike, Thote, Jayshri, Shinde, Digambar Balaji, Banerjee, Rahul, Kurungot, Sreekumar
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description 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 Co­(II) ions into its porous framework. The as-obtained Co-TpBpy retains a highly accessible surface area (450 m2/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/cm2. 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.
doi_str_mv 10.1021/acs.chemmater.6b01370
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title Cobalt-Modified Covalent Organic Framework as a Robust Water Oxidation Electrocatalyst
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