Growth Control of MoS₂ Nanosheets on Carbon Cloth for Maximum Active Edges Exposed: An Excellent Hydrogen Evolution 3D Cathode

To greatly improve the hydrogen evolution reaction (HER) performance, it is the key approach to expose as many active edges of MoS₂ as possible. This target is the research hotspot and difficulty of MoS₂ which is a promising HER catalyst. In this work, we realized the active-edges control of MoS₂ nanosheets on carbon cloth (CC) by growth control during the synthesis procedure. Moreover, MoS₂ nanosheets vertically grown on carbon cloth (MoS₂⊥CC) was confirmed to be the best morphology with maximum active edges exposed. Multifactors structure control resulted in abundant active-edges exposure and effective electron delivery, thus excellent HER activity. This three-dimensional cathode, MoS₂⊥CC, can reach a great current density of 200 mA/cm² at a small overpotential of 205 mV. The preeminent HER performance can rival the best MoS₂-based catalyst ever reported