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首页> 外文期刊>Chinese science bulletin >MNi_4.8Sn_(0.2)(M=La, Nd)-supported multi-walled carbon nanotube composites as hydrogen storage materials
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MNi_4.8Sn_(0.2)(M=La, Nd)-supported multi-walled carbon nanotube composites as hydrogen storage materials

机译：MNi_4.8Sn_（0.2）（M = La，Nd）-负载的多壁碳纳米管复合材料作为储氢材料

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摘要

Two composites LaNi_(4.8)Sn_(0.2)/CNTs and NdNi_(4.8)Sn_(0.2)/CNTs were prepared by an impregnation-reduction method. Their hydrogen storage capacity could reach up to 2.96 wt% and 2.88 wt% respectively at room temperature and 1.0 MPa pressure. Thesevalues, which might result from the synergetic effect between the alloy nanoparticles and the pretreated CNTs, were three times higher than those of the unsupported MNi_(4.8)Sn_(0.2) (M=La, Nd) alloys under the same conditions. XRD and TEM revealed thatthe alloy particles were uniformly dispersed on the CNTs and the average particle size was ca. 30 nm. The composites also showed good stability and the hydrogen storage capacity decreased by less than 6% after 100 adsorption-desorption cycles. Moreover,no noticeable change in crystalline structure was observed for the composites.
机译：通过浸渍还原法制备了两种复合材料LaNi_（4.8）Sn_（0.2）/ CNT和NdNi_（4.8）Sn_（0.2）/ CNT。在室温和1.0 MPa的压力下，它们的储氢能力分别可达2.96 wt％和2.88 wt％。在相同条件下，这些值可能是由于合金纳米粒子与预处理的CNT之间的协同作用而产生的，是未负载MNi_（4.8）Sn_（0.2）（M = La，Nd）合金的三倍。 X射线衍射（XRD）和透射电镜（TEM）表明，合金颗粒均匀地分散在碳纳米管上，平均粒径为约200nm。 30纳米在100次吸附-解吸循环后，复合材料还显示出良好的稳定性，储氢量下降了不到6％。此外，未观察到复合物的晶体结构的明显变化。

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