| Summary: | Tin disulfide (SnS<sub>2</sub>) has gained a lot of interest in the field of converting solar energy into chemical fuels in light-assisted electrochemical water splitting due to its visible-light band gap and high electronic mobility. However, further decreasing the recombination rate of electron-hole pairs and increasing the density of active states at the valence band edge of the photoelectrodes were a critical problem. Here, we were successful in fabricating the super-thin SnS<sub>2</sub> nanostructure by a hydrothermal and solution etching method. The super-thin SnS<sub>2</sub> nanostructure as a photo-electrocatalytic material exhibited low overpotential of 0.25 V at the current density of −10 mA·cm<sup>−2</sup> and the potential remained basically unchanged after 1000 cycles in an H<sub>2</sub>SO<sub>4</sub> electrolyte solution, which was better than that of the SnS<sub>2</sub> nanosheet and SnS/SnS<sub>2</sub> heterojunction nanosheet. These results show the potential application of super-thin SnS<sub>2</sub> nanostructure in electrochemical/photo-electrocatalytic field.
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