Electrochemical CO₂ reduction reaction (CO₂RR) provides a lucrative avenue to convert greenhouse gas CO₂ into valuable products to balance the carbon cycle by coupling with intermittent renewable energy resources. Yet, the current catalysts are suffering from sophisticated preparation, high cost, low activity, undesirable product selectivity, and more importantly, the inhomogeneous nature at the atomical-level for comprehensive mechanism study. Atomical-level Ag nanomaterials have been gaining considerable research attentions as efficient CO₂RR catalysts in the past a few years, thanks to the easy synthesis, relatively low cost, excellent activity, high selectivity toward CO formation, and well-defined structure for establishing the structure-performance relationship. In this review, we first discuss the recent progress of employing atomical-level Ag nanomaterials including atom-precise nanoclusters and atomically dispersed catalysts toward CO₂RR. Specifically, the well-defined structure with corresponding advanced characterizations and in-depth structure-activity correlations of these two types of Ag nanocatalysts are elucidated. Subsequently, the common challenges and some specific perspectives for CO₂RR catalyzed by them are analyzed. Finally, this review is closed with a brief conclusion.

电化学 CO ₂还原反应 (CO ₂ RR)通过与间歇性可再生能源相结合，为将温室气体 CO ₂转化为有价值的产品以平衡碳循环提供了一条有利可图的途径。然而，目前的催化剂存在制备复杂、成本高、活性低、产物选择性不理想，更重要的是，在原子水平上进行综合机理研究的不均匀性。_{原子级银纳米材料作为高效的CO 2}已获得相当多的研究关注RR 催化剂在过去几年中，由于易于合成、相对较低的成本、优异的活性、对 CO 形成的高选择性以及用于建立结构-性能关系的明确结构。在这篇综述中，我们首先讨论了使用原子级 Ag 纳米材料（包括原子级精确纳米团簇和原子级分散催化剂）对 CO ₂ RR 的最新进展。具体而言，阐明了这两种银纳米催化剂具有相应高级表征和深入结构-活性相关性的明确结构。随后，分析了它们催化的CO ₂ RR的共同挑战和一些具体前景。最后，本次审查以一个简短的结论结束。