Nanostructured SnS-N-doped graphene as an advanced electrocatalyst for the hydrogen evolution reaction

The hydrogen evolution reaction (HER) via water splitting requires the development of advanced and inexpensive electrocatalysts to replace expensive platinum (Pt)-based catalysts. The scalable hydrothermal synthesis of SnS on N-reduced graphene (N-rGr) sheets is presented for the first time, which is used as a highly-active electrocatalyst with long-term stability in acidic, neutral, and alkaline media. This hybrid catalyst reveals a low overpotential of -125 mV, Tafel slope of 38 mV dec(-1), exchange current density of 6.23 mA cm(-2), onset potential of 59 mV, and long-term durability.