Issue 8, 2021

Efficient water oxidation using flower-like multiphase nickel hydroxide with Fe doping

Abstract

Ingeniously designing a water-oxidation catalyst with advantages of a large surface area, multicomponent synergy, and optimized electronic structure, especially utilizing a one-step reaction system to achieve these dominant characteristics is pivotal to high-performance electrochemical water splitting. Here, flower-like multiphase nickel hydroxide catalysts doped with Fe (Fe-α,β-Ni(OH)2) are fabricated through a one-pot solvothermal-coordination methodology. The resulting Fe-α,β-Ni(OH)2 presents excellent oxygen production activity. An overpotential of 267 mV is required to drive a current density of 30 mA cm−2. Fe-α,β-Ni(OH)2 achieves stable operation for over 20 h. The considerable OER performance should result from the unique bionic flower structure, large surface area, and Fe-doping as well as the unique phase interfaces between the α- and β-Ni(OH)2 components. Our study provides a new trial of combining several favorable structural features into one material system that benefits efficient OER catalysis based on earth-abundant Fe and Ni elements.

Graphical abstract: Efficient water oxidation using flower-like multiphase nickel hydroxide with Fe doping

Article information

Article type
Communication
Submitted
28 Dec 2020
Accepted
14 Mar 2021
First published
15 Mar 2021

Sustainable Energy Fuels, 2021,5, 2228-2233

Efficient water oxidation using flower-like multiphase nickel hydroxide with Fe doping

X. Zhang, Y. Qiu, W. Zhang, X. Ji and J. Liu, Sustainable Energy Fuels, 2021, 5, 2228 DOI: 10.1039/D0SE01908A

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