The three-dimensional (3D) reduced graphene oxide/carbon nanotube nanocomposites (rGO/CNTs nanocomposites) and reduced graphene oxide nanocomposites (rGO nanocomposites) were anchored with amorphous MoS_x, forming the MoS_x-rGO/CNTs and MoS_x-rGO nanocomposites. Their hydrogen evolution reaction (HER) activities were intensively evaluated. Results indicated that the rGO/CNTs nanocomposite provided more sites for the amorphous MoSx as compared with that of CNTs nanocomposite. Raman spectra of MoS_x-rGO and MoS_x-rGO/CNTs nanocomposites confirmed the amorphous state of MoS_x in all MoS_x anchored nanocomposites. TEM and SEM morphology indicated that the amorphous MoS_x was well-dispersed on the rGO/CNTs and rGO nanocomposites. The amorphous MoS_x nanoparticles in MoS_x-rGO/CNTs and MoS_x-rGO nanocomposites could provide more S atoms at their edges, and therefore greatly improve the HER activity. HER performances indicated that the rGO/CNTs and rGO nanocomposites anchored with crystalline MoS₂ exhibited poor HER performance. In contrast, MoS_x-rGO/CNTs and MoS_x-rGO nanocomposites anchored with a small amount of MoS_x exhibited the excellent HER activity (179 mV of overpotential at 10 mA cm⁻²). Results also indicated that the HER activities of the MoS_x-@rGO nanocomposites were a bit smaller than those of MoS_x-rGO/CNTs nanocomposites. The CNTs in the rGO/CNTs nanocomposites would improve the intimate electrolyte/electrode contact and promote the high-rate charge transfer, which further strengthened their electrocatalytic hydrogen evolution performances.

将三维（3D）还原氧化石墨烯/碳纳米管纳米复合材料（rGO / CNTs纳米复合材料）和还原氧化石墨烯纳米复合材料（rGO纳米复合材料）与非晶态MoS _x锚固，形成MoS _x -rGO / CNT和MoS _x -rGO纳米复合材料。他们的放氢反应（HER）活性进行了深入评估。结果表明，与CNTs纳米复合材料相比，rGO / CNTs纳米复合材料为非晶态MoSx提供了更多的位点。MoS _x -rGO和MoS _x -rGO / CNTs纳米复合材料的拉曼光谱证实了MoS _x在所有MoS _x中的非晶态锚定的纳米复合材料。TEM和SEM的形态表明，非晶态的MoS _x很好地分散在rGO / CNT和rGO纳米复合材料上。MoS _x -rGO / CNT和MoS _x -rGO纳米复合材料中的无定形MoS _x纳米颗粒可以在其边缘提供更多S原子，因此大大提高了HER活性。HER性能表明，锚固有结晶MoS ₂的rGO / CNT和rGO纳米复合材料表现出较差的HER性能。相反，锚固有少量MoS _x的MoS _x -rGO / CNT和MoS _x -rGO纳米复合材料表现出出色的HER活性（在10 mA cm ^-2时过电势为179 mV）。结果还表明，MoS _x- @ rGO纳米复合材料的HER活性比MoS _x -rGO / CNTs纳米复合材料的小。rGO / CNTs纳米复合材料中的CNTs将改善电解质/电极的紧密接触并促进高速率的电荷转移，从而进一步增强了它们的电催化制氢性能。