Nickel-Iron Layered Double Hydroxide for Highly Efficient Oxygen Evolution Reaction

Qiuyu Zhao,Wenke Xi,Jianjun Wang,J Sun,Z Li,X Liu

doi:10.1051/e3sconf/202129001036

Qiuyu Zhao, Wenke Xi + Show 4 more

Open Access

https://doi.org/10.1051/e3sconf/202129001036

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Abstract

It is extensively accepted that electrolysis of water producing regenerable energy is a crucial substitution of traditional fuel strategy. Herein, we report a wet-chemical route to Ni-Fe layered double hydroxide (LDH) interconnected nanosheets with large surface area with the support of vertically aligned ZnO microrods arrays on the nickel foam (Ni-Fe LDH@ZnO/NF) for oxygen evolution reaction. Owing to the 2D Ni-Fe LDH nanosheets distributed in 3D space, the Ni-Fe LDH@ZnO/NF demonstrates excellent OER performances with a reasonably low overpotential of 271 mV at a current density of 10 mA·cm-2, and a long-term stability up to 29 hours. This work proposes a new strategy to prepare Ni-Fe LDH/NF as efficient OER catalyst.

Highlights

With the development of industry and increase of population, it is of great urgency to product clean regenerable energy to replace fossil fuels
The result illustrated that Ni-Fe layered double hydroxide (LDH)@ZnO microrods arrays on nickel foam (ZnO/nickel foam (NF)) exhibited excellent oxygen evolution reaction (OER) activity and long-term stability, which was ascribed to the effective enhancement catalytic surface area after the introduction of Ni-Fe LDH onto ZnO microrods arrays
The Ni-Fe LDH@ZnO/NF mesostructured microrods were synthesized via wet-chemical route

Summary

Introduction

With the development of industry and increase of population, it is of great urgency to product clean regenerable energy to replace fossil fuels. The improvement of the performance of electrocatalytic catalysts contains three main approaches: (1) increasing the catalytic specific surface area of material to expose more catalytic active sites; (2) enhancing the stability through material structure design; (3) improving the catalyst’s electrical conductivity by integrating other components [12]. Among of Ni-Fe-based catalysts [13,14,15,16,17], Ni-Fe layered double hydroxides (LDHs) have been extensively investigated, with a significant improvement of OER activity by structural design [18,19,20,21,22]. The result illustrated that Ni-Fe LDH@ZnO/NF exhibited excellent oxygen evolution reaction (OER) activity and long-term stability, which was ascribed to the effective enhancement catalytic surface area after the introduction of Ni-Fe LDH onto ZnO microrods arrays

Experimental section

Results and discussion

Conclusion