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

Zhi Lu; Shilin Li; Laiyuan Ning; Kun Tang; Yifan Guo; Long You; Chong Chen; Guangxin Wang

doi:10.3390/molecules29092092

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

Molecules. 2024 May 1;29(9):2092. doi: 10.3390/molecules29092092.

Authors

Zhi Lu^{1

2}, Shilin Li^{1

2}, Laiyuan Ning³, Kun Tang^{1

2}, Yifan Guo^{1

2}, Long You¹, Chong Chen¹, Guangxin Wang^{1

2}

Affiliations

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.

Keywords: Ni-based; electrocatalysis; hydrolysis of water; layered double hydroxides.

Grants and funding

This research was funded by the National Natural Science Foundation of China (No. 2022050), the Henna Province science and technology research project (No. 232102230061) and the Student Research Train Program of Henan University of Science and Technology (No. 2022050).