近期,我院教师郑家广(通讯)、张刘挺(通讯),研究生张焱、卢志禹等的研究成果“Boosting the hydrogen storage performance of magnesium hydride with metal organic framework-derived Cobalt@Nickel oxide bimetallic catalyst”在《Chinese Journal of Chemical Engineering》上发表

作者: 发布时间:2023-02-21动态浏览次数:955

近期,我院教师郑家广(通讯)张刘挺(通讯),研究生张焱、卢志禹等的研究成果“Boosting the hydrogen storage performance of magnesium hydride with metal organic framework-derived Cobalt@Nickel oxide bimetallic catalyst”在《Chinese Journal of Chemical Engineering》上发表。

论文简介如下:

In this study, a MOF-derived bimetallic Co@NiOcatalyst was synthesized and doped into MgH2 to improve the hydrogen desorption and resorption kinetics. The Co@NiO catalyst decreased the onset dehydrogenation temperature of MgH2 by 160 °C, compared with un-doped MgH2. The MgH2 + 9 wt% Co@NiO composite released 6.6 wt% hydrogen in 350 s at 315 °C and uptook 5.4 wt% hydrogen in 500 s at 165 °C, showing greatly accelerated de/rehydrogenation rates. Besides, the desorption activation energy of MgH2 + 9 wt% Co@NiO was decreased to 93.8±8.4 kJ·mol-1. Noteworthy, symbiotic Mg2NiH4/Mg2CoH5 clusters were in-situ formed from bimetallic precursors and inlaid on MgH2 surface, which are considered as “multi-step hydrogen pumps”, and provides surface pathways for hydrogen absorption. Meanwhile, the introduced Mg2NiH4/Mg2CoH5 interfaces could provide numerous low energy barrier H diffusion channels, therefore accelerating the hydrogen release and uptake. This research proposes new insights to design high-efficiency bimetallic catalyst for MgH2 hydrogen storage.

全文下载:https://www.sciencedirect.com/science/article/pii/S1004954122002762?via%3Dihub