Research progress on NiCo-LDH electrocatalysts for oxygen evolution reaction

Abstract

Oxygen evolution reaction (OER), serving as a pivotal electrochemical process in water splitting systems and efficient energy storage technologies, holds undeniable significance in the energy sector. NiCo-layered double hydroxide (NiCo-LDH), as an electrocatalyst with unique advantages, exhibits remarkable performance in catalyzing OER under alkaline conditions. With its abundant catalytic active sites, cost-effective production, straightforward preparation processes, and flexible chemical composition and morphology, NiCo-LDH achieves high activity, exceptional stability, and corrosion resistance during OER. As an electrocatalyst with broad application prospects, NiCo-LDH holds immense potential in advancing green and sustainable energy development. With the ongoing exploration of preparation methods and performance optimization strategies, NiCo-LDH is poised to play a more critical role in the clean energy field in the future, contributing to a greener and more sustainable energy future. Therefore, this paper reviews the research progress of NiCo-LDH electrocatalysts in OER. It begins by introducing the evaluation metrics and mechanisms of OER, alongside the structural characteristics and synthesis methods of NiCo-LDH. Subsequently, it focuses on the strategies to improve the defects of NiCo-LDH in OER applications. Finally, it emphasizes the development potential and future challenges of NiCo-LDH electrocatalysts.