Comparative study on the hydrogen storage performance of as-milled MgRENi rapid quenched alloy catalyzed by metal sulfides

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外文摘要：The composites of Mg20Pr1Sm3Y1Ni10 as-quenched alloy and 3％(mass fraction)M(M=CoS,CoS2,MoS2)catalyst were prepared by high-speed vibration ball mill.The effects of metal sulfides on the hydrogenation and dehydrogenation dynamics of alloys were compared.The results show that the as-milled composites contain a large number of amorphous embedded by a small amount of nanocrystals,and there are many point defects.After ball milling,the crystal grain size in the composites containing CoS is relatively larger,followed by CoS2 and MoS2 a-gain.After hydrogenation,the amorphous phase is crystallized to form Mg2NiH4,YH3,Pr8H1896,Sm3H7,Mg,Co or Mo phases,however,Mg2Ni,YH2,PrH2 and Ni3Y phases appeared after dehydrogenation.The maximum hydrogenation capacity of the composites containing CoS,CoS2 and MoS2 are 3.939％,4.265％and 4.507％(mass fraction),respectively.The hydrogenation saturation ratio of composite containing MoS2 is higher than that of the composites containing CoS and CoS2.The dehydrogenation activation energy of the composites containing CoS,CoS2 and MoS2 is 107.76,68.43 and 63.28 kJ·mol-1 H2.On the improvement of hydrogen storage performance of Mg20Pr1Sm3Y1Ni10 alloy,the catalytic effect of MoS2 sulfide is better than that of CoS2 sulfide,and which is better than CoS sulfide.

外文关键词：

Mg20Pr1Sm3Y1Ni10 as-quenched alloyCoSCoS2 and MoS2 sulfideMillingActivation energyHydrogen storage dynamics

作者：

Xiaoping Dong、Zhaoqing Zhang、Liying Yang、Shenghai Xin、Dandan Su、Zhiyuan Li

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作者单位：

Department of Mechanical Design and Manufacture and Automation,Hebei University,Baoding 071000,China

Baoding New Energy Vehicle Power Engineering Technology Research Center,Hebei University,Baoding 071002,China

Hebei Technology Innovation Center for Lightweight of New Energy Vehicle Power System(Preparation),Hebei University,Baoding 071002,China

基金：

Natural Science Foundations in Hebei ProvinceBaoding Science and Technology Planning ProjectHigher Education in Hebei Province School Science and Technology Research ProjectHorizontal project2022 Hebei Province and Hebei University College Students Innovation and Entrepreneurship Training Program2022 Hebei Province and Hebei University College Students Innovation and Entrepreneurship Training Program

项目编号：

E20182012352074P019QN2019209horizontal 2023004820222652022266

出版年：

2024

DOI：

10.1016/j.jma.2022.09.011

镁合金学报(英文)

ISSN：2213-9567

年,卷(期)：2024.12(5)