High-throughput synthesis and screening of hydrogen-storage alloys.
High-throughput synthesis and screening of hydrogen-storage alloys.
复制标题
储氢合金的高通量合成与筛选。
DOI：
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发表时间：
2008
影响因子：
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通讯作者：
Duncan C A Smith
中科院分区：
文献类型：
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作者：
S. Guérin;B. Hayden;Duncan C A Smith
混合金属氢化物材料库是在硅微制造的“热板”MEMS器件阵列上合成的，它允许使用温度编程解吸和红外热成像进行高通量筛选。MEMS器件的加热板是一个低热容量的膜，允许快速和局部温度控制，并从热成像中提取量热数据。该合成方法与筛选芯片相结合，可快速测定材料的解吸温度和氢含量。直接合成混合金属氢化物。对mgxni1 - x氢化物薄膜材料的吸附性能进行了测试，证明了该方法的潜力。结果与文献一致，表明富镁成分中MgH 2相的氢容量和解吸温度最高，并且促进了MgH 4相的低温解吸，同时氢容量降低。
Libraries of mixed-metal hydride materials are synthesized on a silicon microfabricated array of "hot-plate" MEMS devices, which allow high-throughput screening using temperature programmed desorption and infrared thermography. The heating plate of the MEMS device is a membrane with low heat capacity, allowing fast and localized temperature control and the extraction of calorimetric data from thermography. The combination of the synthetic method and screening chip allows a fast determination of the desorption temperature and hydrogen content of the materials. Mixed metal hydrides are synthesized directly. The potential of the method is exemplified by presenting results for the sorption properties of Mg xNi 1- x hydride thin-film materials. The results are consistent with the literature, showing the highest hydrogen capacity and desorption temperature for the MgH 2 phase in Mg-rich compositions and the promotion of a lower temperature desorption from the Mg 2NiH 4 phase, with a concomitant reduction in hydrogen capacity.