Molybdenum sulfide (MoS₂) has been identified as a promising and ample electrocatalyst for hydrogen evolution reaction (HER). Herein, we have synthesized 2D MoS₂ from 1D Molybdenum oxide (MoO₃) prepared via hydrothermal method and subsequent annealing. The HER of the prepared MoO₃ and MoO₃ annealed at temperature varying from 100 to 700 °C is evaluated by utilizing linear sweep voltammetry (LSV) in acidic electrolyte medium with MoO₃@300 °C displaying the best overpotential at 229 mV vs RHE, respectively. The enhanced HER activity of MoO₃ annealed at 300 °C is attributed to its higher crystallinity. Further, the MoO₃ annealed at 300 °C is converted to MoS₂ exhibiting excellent HER performance with overpotential of 197 mV. The Tafel slope, electrochemical active surface area (ECSA) and turn over frequency (TOF) values of MoS_2, MoO_3, at different annealed temperatures have also been analysed in this work.

硫化钼（MoS ₂）已被认为是一种有前途且充足的析氢反应（HER）电催化剂。在此，我们利用水热法和随后的退火制备的一维氧化钼（MoO ₃）合成了2D MoS _{2 。}通过在酸性电解质介质中利用线性扫描伏安法（LSV）评估所制备的MoO ₃和在100至700 °C温度范围内退火的MoO ₃的HER，其中MoO ₃ @300 °C在229 mV vs RHE下显示出最佳过电势， 分别。_{在 300 °C 退火的 MoO 3}的 HER 活性增强归因于其较高的结晶度。此外，MoO ₃在 300 °C 退火后转化为 MoS ₂，表现出优异的 HER 性能，过电势为 197 mV。本文还分析了不同退火温度下MoS _{2 、} MoO ₃的塔菲尔斜率、电化学活性表面积(ECSA) 和翻转频率(TOF) 值。