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LaFeO3 synthesized by solid state method for promoting hydrogen storage
properties of LiAlH4
Siti Nurul Hazwani bt Mohd Nasir
Supervisor: Dr. Mohammad B. Ismail
Bachelor of Applied Science (Electronics and Instrumentation Physics)
School of Ocean Engineering
The effects of a LaFeO3 addition on the hydrogen storage properties of LiAlH4 were
investigated for the first time, to the best of our knowledge. The addition of the LaFeO3
show improved dehydrogenation performance compared with that of undoped LiAlH4.
The onset decomposition temperatures of LaFeO3–doped LiAlH4 decreased from 150
°C to 113 °C in the first step reaction and decreased from 182 °C to 153 °C for the
second step reaction. From the Kissinger plot, the apparent activation energy of the
doped sample were 77 kJ/mol and 90 kJ/mol and undoped sample were 110 kJ/mol
and 121 kJ/mol for the first and second dehydrogenation stage respectively. From the
X-ray diffraction observation, it is believed that the in situ generated of Fe and LiFeO2
provide a synergetic catalytic effect in improving the hydrogen storage properties of
LiAlH4.
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