Metallic Compounds for Electrocatalytic Oxygen Evolution Reaction

The oxygen evolution reaction (OER) stands as a pivotal electrochemical process, playing a crucial role in various cutting-edge renewable energy technologies such as water-splitting and metal-air batteries. However, its inherent sluggish kinetics necessitate a substantial overpotential to drive the OER, which significantly constrains the widespread application of these devices. Consequently, a range of efficient, durable, and cost-effective electrocatalysts, including carbon-based materials, metals, and metallic compounds, have been engineered to reduce the OER overpotential and enhance energy efficiency. In this section, we provide a comprehensive discussion of the recent intriguing advancements in metallic compounds for the OER, with a deep exploration of the catalytic mechanisms and the underlying structure–performance relationships. Specifically, we systematically delve into metal oxides, hydroxides, and their supported single-atom/nanoparticle materials, showcasing their superiority in driving the OER. Finally, we offer some new insights into the remaining challenges and opportunities for the development of metallic compounds.