▎ 摘　　要

Integrated fabrication and synergistic cooperation between active sites and carrier are expected to hunt non -precious electrocatalysts with high efficiency and durability for hydrogen evolution. Herein, the synthesis of N -doped graphene-confined hollow CoSe2 nanoparticles (NG-HCS) anchored on N-doped vertically oriented gra-phene nanomesh arrays (NGM-As) on carbon cloth (CC/NG-HCS@NGM-As) is described. The graphene nano -mesh arrays structure offers rich channels for fast ion/electron transportation and increases the contact area between electrolyte and electrodes. The unique graphene-confined structure not only protects the active sites against pulverization and wastage but also induces the charge transfer, penetration, and rearrangement processes to optimize the adsorption ability of hydrogen. These advantages enable the hybrid electrode to exhibit outstanding hydrogen evolution reaction performance, with a low overpotential of 133 mV at a current density of 10 mA cm-2 in alkaline media. This research opens a new avenue for the rational design of efficient electrocatalysts.