A condensed excited matter called Rydberg Matter (RM) have been studied experimentally for 30 years, but have not sparked widespread attention yet, unlike ordinary Rydberg atoms. RM formed by clusters of Rydberg atoms at a solid surface have a longer lifetime compared to Rydberg atoms, and is liquid-like. This review describes how the RM state is generated, and its potential applications. These include using RM for research into catalysis, space phenomena and sensor applications, or for producing environmentally friendly energy. A background on RM is presented, with its structure and special properties, and the working principle of RM generation. The experimental set-ups, materials, and detectors used are discussed, together with methods to improve the amount of RM produced. The materials used for the catalysts are of special interest, as this should have a large influence on the energy of the RM, and therefore also on the applications. Currently most of the catalysts used are potassium doped iron oxide designed for styrene production, which should give the possibility of improvements. And as there is little knowledge on the exact mechanisms for RM formation, suggestions are given as to where research should start.

凝聚态激发物质称为里德堡物质（RM）的实验研究已有30年，但与普通里德堡原子不同，它尚未引起广泛的关注。由Rydberg原子簇在固体表面形成的RM与Rydberg原子相比具有更长的寿命，并且呈液态。这篇评论描述了RM状态是如何产生的，及其潜在的应用。其中包括使用RM研究催化，空间现象和传感器应用，或产生环境友好的能源。介绍了RM的背景，结构，特殊性能以及RM生成的工作原理。讨论了使用的实验装置，材料和检测器，以及提高RM生成量的方法。用于催化剂的材料特别受关注，因为这应该对RM的能量有很大的影响，因此对应用也有很大的影响。当前，大多数使用的催化剂是设计用于苯乙烯生产的掺杂钾的氧化铁，这应该提供改进的可能性。而且，由于对形成RM的确切机制知之甚少，因此提出了从哪里开始研究的建议。