The fabrication of Co:ZnS/CoS2heterostructure nanowires with a superior hydrogen evolution performance

The ultrafine Co:ZnS/CoS₂heterostructure nanowires with high hydrogen evolution performance by one-step hydrothermal method. The overpotential required to reach a current density of 10 mAcm⁻²was only 78 mV in 0.5 M H₂SO₄solution, and the Tafel slope was 56 mV dec⁻¹.