Abstract:

As a typical post-graphene two-dimensional nanomaterial, MoS₂ has been extensively studied in recent years due to its excellent performance and superior chemical and thermal stability. The structure-performance relationship and reaction mechanism of its catalytic active sites are the current research hotspots. This article introduces the structural characteristics of MoS₂ as well as the distribution of active sites, and focuses on the analysis of the construction methods of MoS₂ active sites in recent years, including the modification of the MoS₂ through dimensions reduction, control of crystal phase, design of special morphology and amorphization. Meanwhile, the synergetic modification of MoS₂ can be achieved by means of atom doping and defect engineering. By discussing the catalytic performance and the corresponding modification reaction mechanism, it is shown that the catalytic performance of MoS₂ can effectively enhanced by using these methods. Finally, the current challenges and research directions are analyzed and summarized, and it is pointed out that to build active sites homogeneously dispersed on MoS₂ and balancing the structure-performance relationship between catalytic activity and stability of the active sites should be the focus of future research on MoS₂ in the field of photoelectrocatalysis.

Key words: molybdenum disulfide, active sites, photoelectrocatalysis, optimization, nanostructure, composites

摘要：

MoS₂是一类典型的后石墨烯二维材料，具有优异的光电性能及良好的化学稳定性，是近年来被广泛研究的一类新型光电催化剂，有关其催化活性位点的构效关系和反应机理是目前的研究热点。本文介绍了MoS₂的结构特性和活性位点分布，重点归纳分析了近年来有关MoS₂活性位点的构筑方法，包括利用降低维度、晶相调控、特殊形貌设计和非晶化等方法对MoS₂本体进行改造，以及采用原子掺杂、缺陷工程的方式对MoS₂进行协同修饰。通过对催化性能及反应机理的研究，表明这些方法能有效提高MoS₂的催化性能。最后，结合研究现状对目前存在的挑战和研究方向进行了分析总结，指出在MoS₂上构造有序分布的活性位点并平衡其稳定性以及催化性能的构效关系是未来MoS₂在光电催化领域中的研究重点。

关键词: 二硫化钼, 活性位点, 光电催化, 优化, 纳米结构, 复合材料