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

Abstract

Efficient evolution of hydrogen through electrocatalysis at low overpotentials holds tremendous promise for clean energy. Herein, a highly active and stable MoS 2 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 MoS 2 nanoparticles on its surface. The nanosize and high dispersion of MoS 2 nanoparticles provide a vast amount of available edge sites and the coupling of RGO and MoS 2 enhances the electron transfer between the edge sites and the substrate, greatly improving the HER activity of PI/CNT‐RGO‐MoS 2 film. The MoS 2 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 MoS 2 ‐based electrocatalysts for HER.