Conclusions
From this study, we concluded the successful synthesis of CdO using the
green method which is easy, cost-effective, and short technique.
Furthermore, the study proved the formation of CdO nanoparticles with
irregular sphere like structures of 55 nm particle size. Regarding the
hydrogen storage, the results prove that the maximum H2uptake was equal to 2.85 Wt.%H2 at a pressure of 69 bar
at 77 K with ∆H=0.62607 KJ/mol H2 and ∆S=3.35697 J/mol
H2. K. Moreover, the thermodynamic studies at four
different temperatures proves that the maximum H2 uptake
could be recorded at a pressure limit of 69-86.2 bar. Meaning that, the
temperature change did not have an effect on the weight value, because
the pressure change was relatively small, which means that it is
possible to reach the highest storage without the need for a low
temperature.