Boosting Hydrogen Evolution on MoS2/N‐doped‐C Nanotubes via Integrated Van der Waals Engineering and Morphology Engineering

Abstract In the realm of electrocatalytic hydrogen evolution reaction (HER), molybdenum disulfide (MoS 2 ) is a material that holds great promise as a substitute for platinum (Pt), which is both expensive and scarce. The restricted number of active sites and low conductivity of MoS 2 have an impact on its catalytic efficiency, however, which hampers the application of MoS 2 ‐based catalysts in practical catalytic hydrogen production. The integrated Van der Waals (vdW) engineering and morphology engineering hold the potential to effectively boost hydrogen evolution on MoS 2 . Herein, hierarchical nanotubes (MoS 2 /N‐doped‐C) assembled from MoS 2 nanosheets sandwiched by N‐doped‐C layers are synthesized utilizing an integration of hydrothermal and annealing. The 3D hierarchical structure with stepped edges, produced by directly integrating carbon layers into the MoS 2 interlayers, enhances the catalytic activity and stability of the HER compared to MoS 2 scattered on conductive carriers. The experimental results demonstrate that MoS 2 /N‐doped‐C shows excellent electrocatalytic HER activity under acidic conditions, exhibiting an extremely small Tafel slope of 42 mV dec −1 , an extremely low overpotential of 41 mV at a geometric current density of 10 mA cm −2 , and maintaining durability for more than 100 h.