A self-template synthesis of defect-rich WS2 as a highly efficient electrocatalyst for the hydrogen evolution reaction

Abstract

Defect-rich tungsten disulfide (WS₂) nanosheets are synthesized via a self-template method, in which tungsten oxide is partially sulfurized to form WS₂/WO₃ nanosheets. The defect-rich WS₂ nanosheets only require an overpotential of 145 mV to achieve a current density of 10 mA cm⁻² with a Tafel slope of 58.5 mV dec⁻¹ and exhibit excellent stability in 0.5 M H₂SO₄ electrolyte.