【摘要】 制备MoS 2催化作用下的球磨态REMg11Ni-5MoS2(质量分数)(RE=Y,Sm)合金,用以比较其储氢性能。储氢性能通过多种方法测定,包括XRD、TEM、自动Sievert设备、TG和DSC。结果显示,两种球磨态的合金都具有纳米晶和非晶结构。与RE=Sm合金相比,RE=Y合金具有较大的吸氢量、较快的吸氢速率、较低的初始放氢温度、较好的放氢性能和较低的放氢活化能,其中较低的放氢活化能被视为其具备较好储氢动力学的原因。更多还原

【Abstract】 To compare the hydrogen storage performances of as-milled REMg11 Ni-5 MoS2(mass fraction)(RE=Y, Sm) alloys, which were catalyzed by MoS2, the corresponding alloys were prepared. The hydrogen storage performaces of these alloys were measured by various methods, such as XRD, TEM, automatic Sievert apparatus, TG and DSC. The results reveal that both of the as-milled alloys exhibit a nanocrystalline and amorphous structure. The RE=Y alloy shows a larger hydrogen absorption capacity, faster hydriding rate, lower initial hydrogen desorption temperature, superior hydrogen desorption property, and lower hydrogen desorption activation energy, which is thought to be the reason of its better hydrogen storage kinetics, as compared with RE=Sm alloy.更多还原