Reduced Graphene Oxide‐Modified Carbon Nanotube/Polyimide Film Supported MoS2 Nanoparticles for Electrocatalytic Hydrogen Evolution

Efficient evolution of hydrogen through electrocatalysis at low overpotentials holds tremendous promise for clean energy. Herein, a highly active and stable MoS₂ electrocatalyst is supported on reduced graphene oxide‐modified carbon nanotube/polyimide (PI/CNT‐RGO) film for hydrogen evolution reaction (HER). The PI/CNT‐RGO film allows the intimate growth of MoS₂ nanoparticles on its surface. The nanosize and high dispersion of MoS₂ nanoparticles provide a vast amount of available edge sites and the coupling of RGO and MoS₂ enhances the electron transfer between the edge sites and the substrate, greatly improving the HER activity of PI/CNT‐RGO‐MoS₂ film. The MoS₂ with a smaller loading less than 0.04 mg cm^?2 on the PI/CNT‐RGO film exhibits excellent HER activities with a low overpotential of 0.09 V and large current densities, as well as good stability. The Tafel slope of 61 mV dec^?1 reveals the Volmer–Heyrovsky mechanism for HER. Thus, this work paves a potential pathway for designing efficient MoS₂‐based electrocatalysts for HER.