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Journal Article

Cobalt-exchanged poly(heptazine imides) as transition metal–Nx electrocatalysts for the oxygen evolution Reaction

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Tarakina,  Nadezda V.
Nadezda V. Tarakina, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Citation

Ye, M.-Y., Li, S., Zhao, X., Tarakina, N. V., Teutloff, C., Chow, W. Y., et al. (2020). Cobalt-exchanged poly(heptazine imides) as transition metal–Nx electrocatalysts for the oxygen evolution Reaction. Advanced Materials, 32(9): 1903942. doi:10.1002/adma.201903942.


Cite as: https://hdl.handle.net/21.11116/0000-0005-A658-D
Abstract
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?1 in 1 m KOH.