Ammonia stands out as a promising carbon-free carrier for the ever-expanding renewable electricity landscape, due to its ease of storage and distribution as well as compatibility with existing infrastructure. Further implementing ammonia as an energy vector in a scalable and economic manner demands multiscale advancements in the electrocatalysis of the ammonia oxidation reaction (AOR), a field that has seen notable progress in recent years. In this review, we present a comprehensive overview on AOR electrocatalysis from the viewpoints of fundamental understanding, electrochemical testing, and material advancements. After outlining the milestone discoveries and discussing prevalent AOR mechanisms, we scrutinize and propose electrochemical protocols that enable proper and fair comparisons of AOR performance. We then summarize recent advances in Pt-based and non-Pt-based electrocatalysts, along with the respective structure-performance discussion. The remaining challenges and perspectives regarding sustainable ammonia energy are provided.

由于氨易于存储和分配以及与现有基础设施的兼容性，氨在不断扩大的可再生电力领域中脱颖而出，成为一种有前途的无碳载体。以可扩展且经济的方式进一步将氨作为能量载体需要在氨氧化反应（AOR）的电催化方面取得多方面的进步，该领域近年来取得了显着进展。在这篇综述中，我们从基础知识、电化学测试和材料进展的角度对 AOR 电催化进行了全面的概述。在概述了里程碑式的发现并讨论了流行的 AOR 机制后，我们仔细研究并提出了能够正确、公平地比较 AOR 性能的电化学协议。然后，我们总结了铂基和非铂基电催化剂的最新进展，以及各自的结构性能讨论。提供了有关可持续氨能源的剩余挑战和前景。