Current research on MoS₂/graphene hybrids for the hydrogen evolution reaction (HER) reveals that there is still a huge challenge due to restacking and the scarcity of active sites. In this work, ultramicro MoS₂ nanosheets with good dispersion and rich active sites are vertically grown on graphene via a self-limited growth strategy (S–MoS₂). Moreover, carbon nanotube (CNT) scaffolds can effectively limit the restacking of graphene and MoS₂, accelerating the transport of electrons and electrolytes. The synergism among the multi-function structures and composition control can improve the electrochemical HER activity. The obtained S–MoS₂/rGO/CNTs exhibits a low overpotential of 159 mV (vs. RHE) at 10 mA cm⁻² and a small Tafel slope of 85 mV dec⁻¹ in 0.5 M H₂SO₄. Moreover, the S–MoS₂/rGO/CNTs shows excellent electrochemical durability at 10 mA cm⁻² for 18 h. This work supplies a fresh strategy to design high-performance and cost-effective MoS₂-based catalysts for the HER.

中文翻译：

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MoO2在石墨烯/ CNTs基质上的自限性转化为超微MoS2纳米片，具有出色的稳定性，可放出氢气

MoS ₂ /石墨烯杂化物用于氢释放反应（HER）的最新研究表明，由于重堆积和活性位点稀缺，仍然存在巨大挑战。在这项工作中，通过自限生长策略（S–MoS ₂）在石墨烯上垂直生长具有良好分散性和丰富活性位点的超微MoS ₂纳米片。此外，碳纳米管（CNT）支架可以有效地限制石墨烯和MoS ₂的重新堆积，从而加速电子和电解质的传输。多功能结构和成分控制之间的协同作用可以提高电化学HER活性。获得的S–MoS ₂ / rGO / CNTs的低电势为159 mV（相对于RHE）在0.5 MH ₂ SO ₄中的10 mA cm ^-2和85 mV dec ^-1的小Tafel斜率。此外，S-MoS ₂ / rGO / CNT在10 mA cm ^-2的条件下显示18小时的出色电化学耐久性。这项工作为设计用于HER的高性能，高性价比的MoS ₂基催化剂提供了新的策略。