▎ 摘　　要

Reduced graphene oxide (RGO)-loaded MoS2 ultrathin nanosheets were grown on Ni3S2 nanorod arrays on Ni foam (RGO-MoS2 double dagger Ni3S2 perpendicular to NF) through a simple one-pot method. The Ni3S2 nanorod arrays initially grow on the Ni foam in a specific orientation, then unexpectedly act as a "skeleton" to support MoS2 nanosheets which form in situ and undergo film-like stretching, resulting in the exposure of abundant Mo-S edges favorable for electrocatalytic water splitting. RGO is incorporated at the same time and offers a fast channel for electronic transfer, which leads to strong electronic interactions in the system. Due to the synergistic effects of the various components in the distinctive 3D structure, the RGO-MoS2 double dagger Ni3S2 perpendicular to NF electrode exhibited a low HER overpotential of 55 mV at a current density of 10 mA/cm(2), a small Tafel slope of 56.43 mV.dec(-1), and demonstrated good longterm stability.