Metal-organic layers (MOLs) have attracted considerable interest in materials science because of their unique characteristics. The past decade has witnessed the rapid development of MOLs in synthesis and applications. Here we present a review of the latest research advances on MOLs. First, we introduce the two preparation approaches for MOLs, namely, the top-down and bottom-up approaches. Then, we discuss the applications of MOLs in gas separation, catalysis, energy catalysis and conversion, and chemical sensors, which emphasize the performance-morphologies/structures relationship of MOLs. At the end of this review, we provide an outlook on the opportunities and challenges of MOLs in the future.

金属有机层 (MOL) 因其独特的特性而引起了材料科学界的极大兴趣。过去十年见证了 MOL 在合成和应用方面的快速发展。在这里，我们回顾了 MOL 的最新研究进展。首先，我们介绍了 MOL 的两种准备方法，即自上而下和自下而上的方法。然后，我们讨论了 MOLs 在气体分离、催化、能量催化和转化以及化学传感器中的应用，其中强调了 MOLs 的性能-形态/结构关系。在这篇评论的最后，我们对 MOL 未来的机遇和挑战进行了展望。