Recent Development in Designing Electrocatalysts for Efficient and Selective Ammonia Oxidation Reaction

Abstract

Ammonia (NH₃) is a critical chemical that is among the top 10 industrial chemicals produced annually in the world. Although the majority of NH₃ is currently used in fertilizer production, it has recently recognized as a promising carrier for the storage, transportation, and utilization of green hydrogen toward a sustainable future. In this process, the electrochemical ammonia oxidation reaction (AOR) is a crucial step and requires efficient catalysts to overcome the sluggish reaction kinetics to enable highly active and selective splitting of ammonia among varied reaction pathways. Herein, we summarize recent advancements in the ammonia oxidation reaction mechanism understandings, performance assessment protocols, and catalyst discovery and device integration to provide a timely overview of this topic. A perspective is provided at the end to cover emerging challenges and a proposal for future development.