MoS₂ has attracted attention as a promising hydrogen evolution reaction (HER) catalyst and a supercapacitor electrode material. However, its catalytic activity and capacitive performance are still hindered by its aggregation and poor intrinsic conductivity. Here, hollow rGO sphere-supported ultrathin MoS₂ nanosheet arrays (h-rGO@MoS₂) are constructed via a dual-template approach and employed as bifunctional HER catalyst and supercapacitor electrode material. Because of the expanded interlayer spacing in MoS₂ nanosheets and more exposed electroactive S–Mo–S edges, the constructed h-rGO@MoS₂ architectures exhibit enhanced HER performance. Furthermore, benefiting from the synergistic effect of the improved conductivity and boosted specific surface areas (144.9 m² g⁻¹, ca. 4.6-times that of pristine MoS₂), the h-rGO@MoS₂ architecture shows a high specific capacitance (238 F g⁻¹ at a current density of 0.5 A g⁻¹), excellent rate capacitance, and remarkable cycle stability. Our synthesis method may be extended to construct other vertically aligned hollow architectures, which may serve both as efficient HER catalysts and supercapacitor electrodes.

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MoS ₂作为一种有前途的氢释放反应（HER）催化剂和超级电容器电极材料引起了人们的关注。但是，它的聚集和不良的固有电导率仍然阻碍了它的催化活性和电容性能。在这里，中空rGO球支撑的超薄MoS ₂纳米片阵列（h-rGO @ MoS ₂）是通过双模板方法构建的，并用作双功能HER催化剂和超级电容器电极材料。由于MoS ₂纳米片中层间间距的扩大以及更多的电活性S–Mo–S边缘暴露，因此构建了h-rGO @ MoS ₂架构展现出增强的HER性能。此外，得益于电导率提高和比表面积增加（144.9 m ²  g ^-1，约为原始MoS _2的4.6倍）的协同作用，h-rGO @ MoS ₂结构显示出高的比电容（ 238 F G ^-1以0.5 g的电流密度^-1），优良率电容，和显着的循环稳定性。我们的合成方法可能会扩展到构建其他垂直排列的空心结构，这些结构既可以用作有效的HER催化剂，也可以用作超级电容器电极。

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