Recent advances in Ru/Ir-based electrocatalysts for acidic oxygen evolution reaction

The electrocatalytic process of water splitting offers a promising approach to produce sustainable hydrogen. However, the slow kinetics of the oxygen evolution reaction (OER) presents a notable challenge, especially in the acidic environment of proton exchange membrane systems. Despite the extensive progress made in catalyst development for hydrogen production through electrolysis in the last century, significant advancements have been accomplished. However, the quest for acidic OER catalysts that possess both high activity and stability, while also being affordable, continues to be challenging. Currently, Ru/Ir-based electrocatalysts are the only practical anode catalysts available. Therefore, it is crucial to explore feasible strategies to enhance the electrocatalytic performance and longevity of acidic OER catalysts. This review offers a comprehensive assessment of the obstacles and prospective advancements in acidic OER catalysts. Additionally, it underscores the areas of research concentration, providing valuable perspectives for future endeavors in catalyst research and development.