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易倍体育官网:易倍体育官网-研究生宋孟臣等的研究成果“Constructing graphene nanosheets supported FeOOH nanodots for hydrogen storage of MgH2”在《 International Journal of Minerals, Metallurgy and Materials》上发表

发布时间:2021-12-30动态浏览次数:214

近期,易倍体育官网-研究生宋孟臣等的研究成果Constructing graphene nanosheets supported FeOOH nanodots for hydrogen storage of MgH2在《 International Journal of Minerals, Metallurgy and Materials》上发表。

论文简介如下:

In this work, novel graphene-supported FeOOH nanodots (FeOOH NDs@G) were successfully prepared by a facile hydrothermal method, and doped into MgH2 through mechanical ball-milling. MgH2 with 10wt% FeOOH NDs@G began to release hydrogen at 229.8°C, 106.8°C lower than that of pure MgH2. The MgH2-10wt% FeOOH NDs@G composite could reversibly absorb 6.0wt% hydrogen at 200°C under 3.2 MPa hydrogen pressure within 60 min. With the addition of FeOOH NDs@G, the dehydrogenation and hydrogenation activation energy of MgH2 was decreased to 125.03 kJ mol-1 and 58.20 kJ mol-1(156.05 kJ mol?1 and 82.80 kJ mol?1 for pure MgH2), respectively. Furthermore, the hydrogen capacity of FeOOH NDs@G composite retained 98.5% of the initial capacity after 20 cycles, showing good cyclic stability. The catalytic action of FeOOH NDs@G towards MgH2 could be attributed to a synergistic effect between graphene nanosheets and in suit formed Fe, which prevented the aggregation of Mg/MgH2 particles and accelerated the hydrogen diffusion during cycling, thus enabling the MgH2-10wt% FeOOH NDs@G composite with excellent hydrogen storage performance.

全文下载:http://ijmmm.ustb.edu.cn/en/article/doi/10.1007/s12613-021-2393-0


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