Toward the rational engineering of Mo-based materials for alkaline oxygen evolution reaction

Abstract

A thorough understanding of the oxygen evolution reaction (OER) in Mo-based materials is crucial for the advancement of water-splitting technologies. However, the identification of the active phase in Mo-based systems remains a subject of debate, largely due to the dissolution of molybdenum oxides in alkaline electrolytes. In this review, we provide a comprehensive overview of recent advances in the application of Mo-based materials for OER in alkaline media, with an emphasis on their diverse roles in catalysis. Various design strategies employed to optimize Mo-based materials are discussed, focusing on how these approaches influence their physicochemical properties and the specific effects of different design perspectives on their OER performance. Additionally, the structure-performance relationship underlying these materials is explored, offering insights into how structural modifications impact catalytic efficiency. Lastly, key challenges for Mo-based materials in OER applications are provided, and future research directions for further improving the efficacy of sustainable water-splitting technologies in alkaline environments are proposed.