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Issue 98, 2019
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Iron carbonate hydroxide templated binary metal–organic frameworks for highly efficient electrochemical water oxidation

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Abstract

Metal–organic frameworks (MOFs) are promising catalysts for electrochemical reactions. Herein, self-supported NiFe-MOF nanoplates grown on Ni foam (NF) were prepared with iron carbonate hydroxide nanosheets (FeCH NSs) as a semisacrificial template and evaluated for the electrocatalytic oxygen evolution reaction (OER). In this approach, the porous FeCH NSs not only serve as the iron source of NiFe-MOF, but also slow down the leaching of Ni ions from the substrate, thus playing a unique role in regulating the morphology of NiFe-MOF with reduced thickness and sizes, enabling rapid electron transfer and mass transport. The resultant NiFe-MOF/FeCH-NF electrode showed higher activity than FeCH template-free electrodes and superior OER performance over other MOF based binder-free OER electrodes. A current density of 10 mA cm−2 was obtained at a low overpotential of 200 mV with excellent durability in alkaline solution. Raman and TEM measurements reveal the partial transformation of NiFe-MOF to hydroxide during water oxidation.

Graphical abstract: Iron carbonate hydroxide templated binary metal–organic frameworks for highly efficient electrochemical water oxidation

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Publication details

The article was received on 22 Sep 2019, accepted on 14 Nov 2019 and first published on 15 Nov 2019


Article type: Communication
DOI: 10.1039/C9CC07433C
Chem. Commun., 2019,55, 14773-14776

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    Iron carbonate hydroxide templated binary metal–organic frameworks for highly efficient electrochemical water oxidation

    J. Du, S. Xu, L. Sun and F. Li, Chem. Commun., 2019, 55, 14773
    DOI: 10.1039/C9CC07433C

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