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Issue 3, 2020
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A one-step synthesis of hierarchical porous CoFe-layered double hydroxide nanosheets with optimized composition for enhanced oxygen evolution electrocatalysis

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Abstract

Hierarchical porous CoFe-LDHs composed of ultrathin nanosheets were successfully prepared by a simple one-step precipitation process of Co2+ and Fe3+ ions, avoiding multiple tedious steps. The optimized composition and the hierarchical porous structure design of the CoFe-LDHs endow them with high activity for OER in alkaline media (1 M KOH). Benefiting from the synergistic catalytic effects of the controllable composition and the structural features of CoFe-LDHs, the superior OER performance of hierarchical porous Co8Fe1-LDH nanosheets with optimal composition is achieved with the smallest overpotential (262 mV at 10 mA cm−2), lowest Tafel slope (42 mV per decade), and excellent long-term stability, which is superior to previously reported LDH-derived and commercial iridium dioxide (IrO2) electrocatalysts, suggesting its promising application as an efficient electrode for OER.

Graphical abstract: A one-step synthesis of hierarchical porous CoFe-layered double hydroxide nanosheets with optimized composition for enhanced oxygen evolution electrocatalysis

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Article information


Submitted
27 Oct 2019
Accepted
24 Nov 2019
First published
25 Nov 2019

Inorg. Chem. Front., 2020,7, 737-745
Article type
Research Article

A one-step synthesis of hierarchical porous CoFe-layered double hydroxide nanosheets with optimized composition for enhanced oxygen evolution electrocatalysis

J. Zhao, X. Wang, F. Chen, C. He, X. Wang, Y. Li, R. Liu, X. Chen, Y. Hao, M. Yang and F. Li, Inorg. Chem. Front., 2020, 7, 737
DOI: 10.1039/C9QI01394F

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