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通过球磨法制备了MgH2-MoS2-PP(PP=热解聚苯胺,wMoS2=wPP=8.33%)复合材料。与纯MgH2对比研究发现,复合材料的初始放氢温度从650 K下降到550 K,并且在573 K下,75 min内的放氢量从0.38%(w/w,下同)提高到2.36%。在423 K下,放氢后产物可在40 min内吸氢2.45%,比纯MgH2高出2.13倍。放氢反应的活化能比纯MgH2(101.83 kJ·mol-1)降低了28.81 kJ·mol-1。MgH2-MoS2-PP复合材料的性能提高是由于PP能够均匀地减小Mg颗粒尺寸,并提高MoS2在体系放氢与再吸氢过程中的催化效率。 相似文献
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Effects of edge hydrogenation and Si doping on spin-dependent electronic transport properties of armchair boron–phosphorous nanoribbons 下载免费PDF全文
In this article, the spin-dependent electronic and transport properties of the armchair boron–phosphorous nanoribbons(ABPNRs) are mainly studied by using the non-equilibrium Green function method combined with the spin-polarized density function theory. Our calculated electronic structures indicate that the edge hydrogenated ABPNRs exhibit a ferromagnetic bipolar magnetic semiconductor property, and that the Si atom doping can make ABPNRs convert into up-spin dominated half metal. The spin-resolved transport property results show that the doped devices can realize 100% spinfiltering function, and that the interesting negative differential resistance phenomenon can be observed. Our calculations suggest that the ABPNRs can be constructed as a spin heterojunction by introducing Si doping partially, and it would be used as a spin-diode for nano-spintronics in future. 相似文献
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通过球磨法制备了MgH2-MoS2-PP(PP=热解聚苯胺,wMOS2=wPP=8.33%)复合材料。与纯MgH2对比研究发现,复合材料的初始放氢温度从650 K下降到550 K,并且在573 K下,75 min内的放氢量从0.38%(w/w,下同)提高到2.36%。在423 K下,放氢后产物可在40 min内吸氢2.45%,比纯MgH2高出2.13倍。放氢反应的活化能比纯MgH2(101.83 kJ·mol-1)降低了28.81 kJ·mol-1。MgH2-MoS2-PP复合材料的性能提高是由于PP能够均匀地减小Mg颗粒尺寸,并提高MoS2在体系放氢与再吸氢过程中的催化效率。 相似文献
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