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Page 46
allied
academies
Journal of Materials Science and Nanotechnology | Volume: 2
August 20-21, 2018 | Paris, France
Materials Science and Materials Chemistry
International Conference on
Catalytic effect of Ti-based additives on hydrogenation of MgH
2
Kumari M
ENEA Casaccia Research Center, Italy
V
arious Ti-based additives (TiF
4
, TiO
2
and TiH
2
) were added
to MgH
2
by ball milling and their catalytic effect on
hydrogenation properties was investigated. All these additives
significantly improved the dehydrogenation performances
of MgH
2
but among them, TiF
4
shows best catalytic effect
followed by TiO
2
and TiH
2
sequentially. The activation energy of
dehydrogenation was calculated by using Kissinger’s equation.
The result shows that activation energy decreases from -170.48
kJ/mol for as- milled MgH
2
to -77.58 kJ/mol for MgH
2
-TiH
2
and
further lowers to -75.50 kJ/mol to -70.82 kJ/mol for the MgH
2
–
TiO
2
and MgH
2
-TiF
4
. Thermogravimetric analysis (TGA) shows
the onset desorption temperature of MgH
2
was also reduced
by the addition of different Ti-based additives. XPS studies show
that the catalytic effect of these additives on hydrogenation/
dehydrogenation kinetics was due to by the formation of
different active species.
e:
jangirmukesh15@gmail.com