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

Anandajayarajan Udayakumar1

Preethi Dhandapani1

Senthilkumar Ramasamy2

Subramania Angaiah1,*,Email

Electro-Materials Research Laboratory, Centre for Nanoscience and Technology, Pondicherry University, Puducherry, 605014, India

Department of Chemical Engineering and Materials Science, Amritha Vishwa Vidyapeetham, Coimbatore, 641112, India

Abstract

To address the need for clean and sustainable fuel sources, it is important to develop a high-performance, low-cost and stable non-noble metal electrocatalyst for water splitting. Two-dimensional (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.