Layered Double Hydroxide (LDH) – MXene Nanocomposite for Electrocatalytic Water Splitting: Current Status and Perspective

To address the need for clean and sustainable fuel sources, it is important to develop a highperformance, low-cost and stable non-noble metal electrocatalyst for water splitting.Twodimensional (2D) materials, namely Layered Double Hydroxide (LDH) and Mxene have gained popularity in recent years.Moreover, the combination of these two materials has been found to effectively address the issues related to poor conductivity, limited exposure of active sites, and small electrochemical active surface areas that hindered the practical application of LDH.In this review, we comprehensively evaluate the advancements made in the development of MXene-based LDH hybrid nanomaterials for hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and overall water splitting from both a theoretical and practical standpoint.Additionally, the review discusses various criteria used to assess electrocatalysts and the mechanism involved in the electrochemical splitting of water.Lastly, potential opportunities and future challenges of MXene-based LDH hybrids in hydrogen production through water splitting are examined.