Cooperative Catalysis on the Dehydrogenation of NdCl₃ Doped LiBH₄-MgH₂ Composites

抄録

To improve the dehydrogenation properties of LiBH₄, the MgH₂ and NdCl₃ were added with different modes by ball-milling, and their influences on the decomposition of LiBH₄ were investigated by performing X-ray diffraction (XRD) analysis and dehydriding kinetic measurements. The results show that adding either NdCl₃ or MgH₂ alone could not promote the decomposition of LiBH₄. But for the NdCl₃ doped LiBH₄-MgH₂ composites, not only the decomposition of MgH₂ is accelerated, but also the dehydrogenation rate and capacity of LiBH₄ are greatly enhanced. The kinetic improvement is attributed to a cooperative catalytic role arising from dual addition of MgH₂ and NdCl₃. The NdH₂ phase, resulting from reaction between MgH₂ and NdCl₃, might be responsible for the enhanced dehydrogenation of LiBH₄.