近期，由我院研究生宋孟臣和本科生谢润凯为共同第一作者的研究成果“Combined “Gateway” and “Spillover” effects originated from a CeNi5 alloy catalyst for hydrogen storage of MgH2”在《International Journal of Minerals, Metallurgy and Materials》上发表。
论文简介如下：
Efficient catalysts enable MgH2 with superior hydrogen storage performance. Herein, we successfully synthesized a catalyst composed of Ce and Ni (i.e. CeNi5 alloy) with splendid catalytic action for enhancing the hydrogen storage property of magnesium hydride (MgH2). The MgH2+5 wt%CeNi5 compositestarted to release hydrogen at 174 °C and approximately 6.4 wt% H2 was released at 275 °C within 10 min. Besides, the dehydrogenation enthalpy of MgH2 was slightly decreased by adding CeNi5. For hydrogenation, the fully dehydrogenated sample absorbed 4.8 wt% H2 at a low temperature of 175 °C. The hydrogenation apparent activation energy was decreased from 73.60±1.79 kJ/mol to 46.12±7.33 kJ/mol. Microstructure analysis revealed that Mg2Ni/Mg2NiH4 and CeH2.73 were formed in theprocess of hydrogen absorption and desorption, exerted combined “Gateway” and “Spillover” effects to promote hydrogen migration and diffusion along the grain boundaries, thus lowering the operating temperature and improving the hydrogen storage kinetics of MgH2. Our work provides an example of merging “Gateway” and “Spillover” effects in one catalyst and may shed light on designing novel highly-effective catalysts for MgH2 in near future.
本文下载地址：
http://ijmmm.ustb.edu.cn/article/doi/10.1007/s12613-022-2529-x