Two-dimensional layered transition metal carbides (MXenes), have huge potential advantage for applications in hydrogen evolution reaction (HER). However, the hindered hydrogen evolution at large current densities and the instability of MXenes during HER remains major challenges. Herein, we report the MoS₂/Mo₂CT_x nanoarray with aerophobic structure via molten salt synthesis. In situ vertical distribution of MoS₂ nanoarray on the surface of Mo₂CT_x accelerates hydrogen gas release from the electrode, exhibiting significantly enhanced catalytic activity and stability to bare MoS₂ and Mo₂CT_x. The MoS₂/Mo₂CT_x nanoarray possesses excellent stability at −100 mA/cm² for 100 h with only 3% overpotential increase. Our work provides guidance for developing high-stability MXene-based catalysts by virtue of in situ bonding between nanoarray and MXene.

二维层状过渡金属碳化物（MXenes）在析氢反应（HER）中的应用具有巨大的潜在优势。然而，大电流密度下析氢受阻以及 MXene 在 HER 过程中的不稳定性仍然是主要挑战。在此，我们通过熔盐合成报道了具有疏气结构的MoS ₂ /Mo ₂ CT _{x纳米阵列。MoS 2纳米阵列在Mo 2} CT _x表面上的原位垂直分布加速了氢气从电极的释放，对裸露的MoS ₂和Mo ₂ CT _x表现出显着增强的催化活性和稳定性。MoS ₂ /Mo ₂ CT _x纳米阵列在-100 mA/cm ²下100小时内具有优异的稳定性，过电势仅增加3%。我们的工作为利用纳米阵列和 MXene 之间的原位键合开发高稳定性 MXene 基催化剂提供了指导。