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Enhanced hydrogen storage properties of NaAlH4 catalysed by CuFe2O4 for<br />

solid state hydrogen storage material<br />

Muhammad Arash bin Raees Ahmad<br />

Supervisor: Dr. Mohammad Bin Ismail<br />

Bachelor of Applied Science (Electronics and Instrumentation Physics)<br />

School of Ocean Engineering<br />

The effects of CuFe2O3 addition on the hydrogen storage properties of NaAlH4<br />

prepared by ball milling were investigated for the first time. The 5 wt.% CuFe2O3-<br />

added NaAlH4 sample showed an improvement in hydrogenation sorption properties<br />

compared to that of undoped NaAlH4, with the onset dehydrogenation temperature<br />

reduced from 220 °C to 165 °C. From the Kissinger plot of differential scanning<br />

calorimetry, the apparent activation energy was 110.0 kJ/mol for as-milled NaAlH4 and<br />

98.6 kJ/mol for 5 wt.% CuFe2O3-added NaAlH4, indicating that CuFe2O3 addition<br />

decreased the activation energy for hydrogen desorption of NaAlH4. It is believed that<br />

the formation of in situ active species could provide a synergetic catalytic effect in<br />

enhancing the hydrogen sorption properties of NaAlH4.<br />

146 | U M T U N D E R G R A D U A T E R E S E A R C H D A Y 2 0 1 9

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