期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 2, 期 25, 页码 9645-9655出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta00221k
关键词
-
资金
- Australian Research Council (ARC)
- Ministry of Science and Technology of China [2010CB631302]
Magnesium (Mg) was coated by different transition metals (TM: Ti, Nb, V. Co, Mo, or Ni) with a grain size in the nano-scale to form a core (Mg)-shell (TM) like structure by reaction of Mg powder in THF solution with TMClx. The thickness of the TM shell is less than 10 nm. TPD-MS results show the Mg-Ti sample can release hydrogen even under 200 degrees C. It is experimentally confirmed that the significance of the catalytic effect on dehydrogenation is in the sequence Mg-Ti, Mg-Nb, Mg-Ni, Mg-V, Mg-Co and Mg-Mo. This may be due to the decrease in electro-negativity (chi) from Ti to Mo. However, Ni is a special case with a high catalytic effect in spite of the electro-negativity. It is supposed that the formation of the Mg2Ni compound may play an important role in enhancing the hydrogen de/hydrogenation of the Mg-Ni system. It is also found that the larger the formation enthalpy, the worse the dehydrogenation kinetics.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据