近期，我院留学生研究生Farai Michael Nyahuma、教师郑家广、肖蓓蓓、张刘挺等的研究成果“Significantly improved hydrogen storage behaviors of MgH₂ with Nb nanocatalyst”在A类期刊《 International Journal of Minerals, Metallurgy and Materials》上发表。

论文简介如下：

The study explores the excellent modification effect of Nb nanocatalyst prepared via surfactant assisted ball milling technique (SABM) on the hydrogen storage properties of MgH₂. Optimal catalyst doping concentration was determined by comparing onset decomposition temperature, released hydrogen capacity and reaction rate for different MgH₂+ywt% Nb (y = 0, 3, 5, 7, 9) composites. The MgH₂+5wt% Nb composite started releasing hydrogen at 186.7℃ and a total of 7.0wt% hydrogen was released in the dehydrogenation process. In addition, 5wt% Nb doped MgH₂ also managed to release 4.2wt% H₂ within 14 minutes at 250℃ and had the ability to absorb 4.0wt% hydrogen in 30 minutes at 100℃. Cycling tests revealed that MgH₂+5wt% Nb could retain 6.3 wt% H₂ capacity (89.2%) after 20 cycles. Dehydrogenation and hydrogenation activation energy values were decreased from 140.51±4.74 kJ·mol^-1 and 70.67±2.07 kJ·mol^-1 to 90.04±2.83 kJ·mol^-1 and 53.46±3.33 kJ·mol^-1 after doping MgH₂ with Nb, respectively. Microstructure analysis proved that homogeneously distributed NbH acted as active catalytic unit for improving the hydrogen storage performance of MgH₂. These results indicate SABM can be considered as an option to develop other nanocatalysts for energy related areas.

全文下载：http://ijmmm.ustb.edu.cn/en/article/doi/10.1007/s12613-021-2303-5