Not only electrochemical charge storage, but also the electrocatalytic hydrogen evolution (HER) performance is dependent on MoS2 crystal structure and morphology . This led to the exploration of various hydrothermal synthesis routes controlling MoS2 structure by choice of sulfur-precursor . found that thioacetamide (TAA) and L-cysteine (LC) possess lower decomposition temperatures than thiourea (TU), thereby releasing sulfur more readily, leading to smaller particle sizes and the tendency to form the 1T-polytype, which in turn, leads to a favorable HER activity .