Nickel–Iron-Layered Double Hydroxide Electrocatalyst with Nanosheets Array for High Performance of Water Splitting

Author:

Lu Zhi12,Li Shilin12,Ning Laiyuan3,Tang Kun12,Guo Yifan12,You Long1,Chen Chong1,Wang Guangxin12

Affiliation:

1. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China

2. Henan Engineering Research Center for High Purity Materials and Sputtering Targets, Luoyang 471003, China

3. School of Material Science and Engineering, Zhengzhou University, Zhengzhou 450001, China

Abstract

Developing high-performance and cost-competitive electrocatalysts have great significance for the massive commercial production of water-splitting hydrogen. Ni-based electrocatalysts display tremendous potential for electrocatalytic water splitting. Herein, we synthesize a novel NiFe-layered double hydroxide (LDH) electrocatalyst in nanosheets array on high-purity Ni foam. By adjusting the Ni/Fe ratio, the microstructure, and even the behavior of the electrocatalyst in the oxygen evolution reaction (OER), changes significantly. The as-obtained material shows a small overpotential of 223 mV at 10 mAcm−2 as well as a low Tafel slope of 48.9 mV·dec−1 in the 1 M KOH electrolyte. In addition, it can deliver good stability for at least 24 h of continuous working at 10 mAcm−2. This work proposes a strategy for engineering catalysts and provides a method for the development of other Ni-based catalysts with excellent performance.

Funder

National Natural Science Foundation of China

Henna Province science and technology research project

Henan University of Science and Technology

Publisher

MDPI AG

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