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Intramolecular electronic coupling in porous iron cobalt (oxy)phosphide nanoboxes enhances the electrocatalytic activity for oxygen evolution

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Abstract

Efficient electrocatalysts are of great importance in improving the water splitting efficiency. Herein, we develop a self-templating strategy to construct porous iron cobalt (oxy)phosphide (Fe–Co–P) nanoboxes as promising pre-catalysts for the oxygen evolution reaction in alkaline solution. The constructed Fe–Co–P nanoboxes exhibit excellent electrocatalytic activity and afford a current density of 10 mA cm−2 at a small overpotential of 269 mV. Moreover, the structural evolution of the metal phosphides in the oxygen evolution process has been well monitored. X-ray absorption near-edge structure analyses and computational studies reveal that the structural merits and the effective intramolecular electronic coupling between the Fe and Co atoms via P/O bridges are responsible for the greatly improved electrocatalytic activity.

Graphical abstract: Intramolecular electronic coupling in porous iron cobalt (oxy)phosphide nanoboxes enhances the electrocatalytic activity for oxygen evolution

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Publication details

The article was received on 30 Aug 2019, accepted on 02 Oct 2019 and first published on 02 Oct 2019


Article type: Paper
DOI: 10.1039/C9EE02787D
Energy Environ. Sci., 2019, Advance Article

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    Intramolecular electronic coupling in porous iron cobalt (oxy)phosphide nanoboxes enhances the electrocatalytic activity for oxygen evolution

    H. Zhang, W. Zhou, J. Dong, X. F. Lu and X. W. (. Lou, Energy Environ. Sci., 2019, Advance Article , DOI: 10.1039/C9EE02787D

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