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Enhancement of hydrogen storage in MgNi by Pd-coating

机译:Pd涂层增强MgNi中的氢存储

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摘要

MgNi alloys prepared by mechanical alloying were coated with Pd nanoparticles via a polyol process. Such a process allows the deposition of fine particles of metal catalysts on the MgNi alloy surface. This surface modification leads to a strong improvement of the H storage performances of the alloy. The hydrogen release at 150 deg C increases from 0.6 wt. percent for uncoated MgNi alloy to 1.5 wt. percent for a 5 wt. percent Pd-coated MgNi alloy. The strong enhancement of the desorption capacity probably results from the catalytic effect of Pd, which may act as a hydrogen pump, thus favoring hydrogen migration from the bulk to the surface of the alloy.
机译:通过多元合金工艺,通过Pd纳米颗粒涂覆通过机械合金化制备的MgNi合金。这样的过程允许金属催化剂的细颗粒沉积在MgNi合金表面上。这种表面改性导致合金的H储藏性能大大提高。 150℃下的氢气释放量从0.6 wt。未镀覆的MgNi合金的1.5%至1.5 wt。 5 wt。%百分比的Pd涂层MgNi合金。解吸能力的强力增强可能是由于Pd的催化作用所致,它可以充当氢气泵,因此有利于氢气从合金块体迁移到合金表面。

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