LAUSR

Intriguing amorphous/quasiamorphous molybdenum sulfide (MoSx) materials with active terminal disulfide S22− units have been recognized recently as prominent catalysts for the hydrogen evolution reaction (HER). Here, we diversify the MoSx morphologies and structures by a facile template‐free solvothermal method to prepare fascinating MoSx nanosheet‐based hollow porous flat boxes and nanotubes. As we increase the ethanol concentration in the mixed solvent for the reaction from 60 to 100 vol %, highly dispersed MoSx materials are obtained and the morphologies change from nanosheet to nanosheet‐based hollow porous nanotubes and ultimately to nanosheet‐based hollow porous flat boxes with the increasing S22− content. Catalytic measurements demonstrate that the hollow porous MoSx flat boxes and nanotubes have similar outstanding HER performances and can reach 10 mA cm−2 current at overpotentials of approximately 206 and 210 mV, respectively.