TY - JOUR
T1 - Mg-TM (TM: Ti, Nb, V, Co, Mo or Ni) core-shell like nanostructures
T2 - Synthesis, hydrogen storage performance and catalytic mechanism
AU - Cui, Jie
AU - Liu, Jiangwen
AU - Wang, Hui
AU - Ouyang, Liuzhang
AU - Sun, Dalin
AU - Zhu, Min
AU - Yao, Xiangdong
PY - 2014/7/7
Y1 - 2014/7/7
N2 - 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 TMCl x. 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 °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 (χ) 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. This journal is
AB - 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 TMCl x. 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 °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 (χ) 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. This journal is
UR - https://www.scopus.com/pages/publications/84902667378
U2 - 10.1039/c4ta00221k
DO - 10.1039/c4ta00221k
M3 - 文章
AN - SCOPUS:84902667378
SN - 2050-7488
VL - 2
SP - 9645
EP - 9655
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 25
ER -
