Hydrogen storage performances of as-milled REMg_(11)Ni(RE=Y, Sm) alloys catalyzed by MoS_2  

MoS_2催化的球磨态REMg_(11)Ni(RE=Y,Sm)合金的储氢性能（英文）

作　　者：Yang-huan ZHANG Wei ZHANG Ze-ming YUAN Wen-gang BU Yan QI Xiao-ping DONG Shi-hai GUO 张羊换;张巍;袁泽明;卜文刚;祁焱;董小平;郭世海(内蒙古科技大学内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室,包头014010;钢铁研究总院功能材料研究所,北京100081;河北大学机械系,保定071002)

机构地区：[1]Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources,Inner Mongolia University of Science and Technology,Baotou 014010,China [2]Department of Functional Material Research,Central Iron and Steel Research Institute,Beijing 100081,China [3]Department of Mechanical Engineering,Hebei University,Baoding 071002,China

出　　处：《Transactions of Nonferrous Metals Society of China》2018年第9期1828-1837,共10页中国有色金属学报（英文版）

基　　金：Projects(51761032,51471054,51871125)supported by the National Natural Science Foundation of China

摘　　要：To compare the hydrogen storage performances of as-milled REMg11Ni-5MoS2(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.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。

关 键 词：Mg-based alloy ball milling CATALYST rare earth element hydrogen storage performance 

分 类 号：TG139.7[一般工业技术—材料科学与工程]