Fe₂O₃–CeO₂ Ceramic Nanocomposite Oxide: Characterization and Investigation of the Effect of Morphology on Its Electrochemical Hydrogen Storage Capacity

The CHP technique is applied for evaluating of hydrogen storage capacity of the Fe2O3–CeO2 nanocomposite oxide. The Fe2O3–CeO2 nanocomposite oxide has been synthesized via a thermal decomposition route using different solvents. To achieve better morphology, various parameters were studied such as calcination temperature, type of solvent, and the changing molar ratio of Ce:Fe. Then, XRD, EDS, FT-IR, SEM, TEM, and BET have been applied to characterize the prepared nanocomposite oxide. The electrochemical hydrogen storage capacity of the proposed nanocomposite oxide was studied for two samples, 4 and 7. The discharge capacity of samples at the 1st and 20th cycles was observed at 940 mAh/g (≈3.1 wt %) and 6450 mAh/g (≈21.5 wt %) for sample 4 and from 850 mAh/g (≈2.8 wt %) to 5450 mAh/g (≈18.2 wt %) for sample 7. The enhancement of their electrochemical hydrogen storage capacity is owing to the creation of new sites during charge and discharge process in the working electrode (Fe2O3–CeO2 nanocomposite oxide).