Amorphous materials are one kind of nonequilibrium materials and have become one of the most active research fields. Compared with crystalline solids, the theory of amorphous materials is still in infancy because their characteristic of atomic arrangement is more like liquid and has no long-range periodicity. Recently, as the representative of amorphous materials, amorphous molybdenum sulfide (a-MoS_x) with unique physical and chemical properties has been studied extensively. However, considerable debate surrounds the structure—property relationships of a-MoS_x owing to its diverse Mo-S motifs. Herein, we summarize recent discoveries and research results regarding a-MoS_x, whose structural characteristics, synthetic strategies, formation criteria, and comprehensive applications are discussed in detail. Finally, this review is ended with our personal insights and critical outlooks over the development of a-MoS_x.

非晶材料是一种非平衡态材料，已成为研究最为活跃的领域之一。与结晶固体相比，非晶材料的理论还处于起步阶段，因为它们的原子排列特性更像液体，没有长程周期性。近年来，作为无定形材料的代表，具有独特物理和化学性质的无定形硫化钼（a -MoS _x）被广泛研究。然而，由于其多样化的 Mo-S 基序，围绕a - MoS _x的结构-性质关系存在相当大的争论。在此，我们总结了关于a -MoS _{x的最新发现和研究结果。}，对其结构特征、合成策略、形成标准和综合应用进行了详细讨论。最后，本文以我们对a -MoS _x发展的个人见解和批判性观点结束。