Cobalt-Exchanged Poly(Heptazine Imides) as Transition Metal-N<sub>x</sub> Electrocatalysts for the Oxygen Evolution Reaction.
basic_science · Level V
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- Record sourced from PubMed, PMID 31984551.
- Also identified by DOI 10.1002/adma.201903942.
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Abstract
Poly(heptazine imides) hosting cobalt ions as countercations are presented as promising electrocatalysts for the oxygen evolution reaction (OER). A facile mixed-salt melt-assisted condensation is developed to prepare such cobalt poly(heptazine imides) (PHI-Co). The Co ions can be introduced in well-controlled amounts using this method, and are shown to be atomically dispersed within the imide-linked heptazine matrix. When applied to electrocatalytic OER, PHI-Co shows a remarkable activity with an overpotential of 324 mV and Tafel slope of 44 mV dec<sup>-1</sup> in 1 m KOH.