Zhang, Jun, Shan, Jiawei, Li, Ping, Zhai, Fuqiang, Wan, Qi, Liu, Zhaojiang, and Qu, Xuanhui
Ferrites (CoFe 2 O 4 , ZnFe 2 O 4 , MnFe 2 O 4 and Mn 0.5 Zn 0.5 Fe 2 O 4 ) nanoparticles can all significantly reduce the desorption temperature of MgH 2 , and CoFe 2 O 4 shows the best catalytic performance among the four ferrites. After dehydrogenation, new by-products including Mg, Co 3 Fe 7 and MgO phases are found for the CoFe 2 O 4 doped samples, and Mg, Fe 3 Zn 10 , Fe and MgO phases are identified for the ZnFe 2 O 4 doped samples. Mg, Fe, Mn and MgO phases are observed for the MnFe 2 O 4 doped samples, while Mg, Fe 3 Zn 10 , Mn, Fe and MgO phases appear for the Mn 0.5 Zn 0.5 Fe 2 O 4 doped samples. New forming phases Co 3 Fe 7 , MgO and Co also have a great catalytic effect on the MgH 2 hydrogen storage properties. The onset desorption temperature of MgH 2 doped with bimetallic catalysts (20 wt.% Co + 20 wt.% MgO and 20 wt.% Co 3 Fe 7 + 20 wt.% MgO) is lower than that of MgH 2 doped with the single catalyst (40 wt.% Co, 40 wt.% MgO and 40 wt.% Co 3 Fe 7 ), indicating that MgO and Co or MgO and Co 3 Fe 7 have the combination catalytic function. [ABSTRACT FROM AUTHOR]