Metal Oxide-Based Electrocatalytic Materials

Metal oxide-based electrocatalytic materials have gained significant attention in the field of overall water splitting. Platinum and platinum group transition metals/metal oxides are commonly used materials for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). But its high cost and low abundance restrict them from practical commercialization. Low-cost metal oxides have unique properties, such as abundant raw material, tunable electronic structure, and remarkable stability under demanding electrochemical conditions, etc. Hence, metal oxide-based electrocatalysts hold immense potential for driving the water-splitting process and contributing to a clean and sustainable energy landscape. Continued research and innovation in this field will be instrumental in overcoming challenges, advancing catalyst performance, and accelerating the adoption of water-splitting technologies for a brighter and more environmentally friendly future. This chapter summarizes the systematic development in the metal oxide-based electrocatalyst, which includes bimetal oxides, tri-metal oxides, and so on for Hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) respectively. Also summarized the different approaches for enhancing catalytic activity, stability, and performance by manipulating surface chemistry, morphology, and active site density. The performance and stability of the material for overall water splitting across a wide pH range and important steps for commercialization are also summarized one by one.