MXene Hybrid Nanosheet of WS(2)/Ti(3)C(2) for Electrocatalytic Hydrogen Evolution Reaction

[Image: see text] Designing low-cost hybrid electrocatalysts for hydrogen production is of significant importance. Recently, MXene-based materials are being increasingly employed in energy storage devices owing to their layered structure and high electrical conductivity. In this study, we propose a facile hydrothermal strategy for producing WS(2)/Ti(3)C(2) nanosheets that function as electrocatalysts in the hydrogen evolution reaction (HER). WS(2) provides a high surface area and active sites for electrocatalytic activity, whereas MXene Ti(3)C(2) facilitates charge transfer. As a result, the synthesized WS(2)/Ti(3)C(2) offers an increased surface area and exhibits an enhanced electrocatalytic activity in acidic media. The WS(2)/Ti(3)C(2) (10%) catalyst exhibited a low onset potential of −150 mV versus RHE for the HER and a low Tafel slope of ∼62 mV dec(–1). Moreover, WS(2)/Ti(3)C(2) (10%) exhibited a double-layer capacitance of 1.2 mF/cm(–2), which is 3 and 6 times greater than those of bare WS(2) and Ti(3)C(2), respectively. This catalyst also maintained a steady catalytic activity for the HER for over 1000 cycles.