Solvent Mediated Fabrication of Ditched Hollow Indium Sulfide (In2S3) Spheres for Overall Electrocatalytic Water Splitting

The controlled synthesis of nanomaterials is of prime importance in modern-day science. Here, we report the shape-controlled synthesis of In2S3 spheres via a one-step solvent-mediated method. The process is very economical as it requires only the switching of solvent during synthesis (pure ethylene glycol, ethylene glycol/water, and ethylene glycol/ethanol mixtures) to fabricate porous and hollow In2S3 spheres. We have chosen deliberately a high boiling solvent and a combination of high and low boiling solvents to control the morphology. The synthesized In2S3 hollow spheres are proved to be electrocatalytically active for overall electrocatalytic water splitting and drive the oxygen evolution reactions at 230 mV, and hydrogen evolution reactions at 239 mV to produce a current density of 10 mA cm-2, respectively.