▎ 摘　　要

Efficient hydrogen evolution reaction (HER) has become an increasingly eye-catching strategy for renewable clean energy production. To promote the catalytic performance and reduce the H-2 generation costs, transition metal catalysts have been widely studied. In this work, we employed reduced graphene oxide (rGO) as a platform to grow carbon nanotubes (CNTs) confined Ni-Ni12P5 nanoparticles (Ni-Ni(12)Ps@CNTs/rGO). The obtained catalyst was carefully characterized and found that the metallic Ni is essential to the formation of CNTs and promotion of HER performance. The Ni-Ni12P5@CNTs/rGO composite with unique structure showed an excellent HER performance in an acidic solution with a Tafel slope of 55.43 mV dec(-1) and an exchange current density of 5.62 x 10(-3) mA cm(-2), which is much higher than the metallic Ni free catalyst. Further experiments found that the boosted HER performance originates from the synergic effect of metallic Ni, Ni-Ni-Ni12P5, and CNTs. Moreover, owing to the confining effect of the CNTs, the Ni-Ni12P5@CNTs/rGO showed outstanding stability during the 10 h stability test.