Synthesis, characterization, and investigation of the electrochemical performance of perovskite (DyFeO3) oxide-based nanocomposite in hydrogen storage

After hybrid and electric cars, the world's automotive pioneers are trying to commercialize cars based on hydrogen fuel. Therefore, the widespread use of hydrogen as an automotive fuel has encouraged us to prepare nano-sized DyFeO3/CuO composites via the green pechini sol-gel procedure using Capsicum annuum L extract as electrode material for hydrogen storage application. Capsicum annuum L extract, due to having a set of biomolecules compatible with the environment, acts as an excellent spatial barrier to control the nucleation process and prevents the accumulation of particles. The compositional analysis of prepared nanostructures was confirmed using Fourier transform infrared (FT-IR), X-ray diffraction (XRD) and energy-dispersive X-ray (EDX) and vibrating sample magnetometer (VSM). Also, the porosity and morphology of samples were investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and BET analysis. The effect of adding CuO and graphite carbon nitride (g-C3N4) nanostructures was evaluated on discharge capacity and cyclic voltammetry methods. The attained DyFeO3/CuO/g-C3N4 nano-products could be utilized as a promising new nanocomposite for electrochemical hydrogen storage. It was found that DyFeO3/CuO/g-C3N4 nanocomposites have a special hydrogen storage accomplishment due to the synergistic effects of CuO and g-C3N4 components, which can increase the storage capability to 1600 mAhg-1 after 20 cycles by facilitating the hydrogen charge-discharge process.

Synthesis, characterization, and investigation of the electrochemical performance of perovskite (DyFeO3) oxide-based nanocomposite in hydrogen storage Keywords:

Nanocomposite , Green pechini , Electrochemical hydrogen storage , DyFeO3