A Novel and Facile Route for the Electrosynthesis of Ho2O3 Nanoparticles and Its Nanocomposite with p-Type Conductive Polymer: Characterisation and Electrochemical Performance

In this paper, a simple and rapid electrochemical method has been carried out to prepare Holmium oxide (Ho2O3) nano particles and composite film to serve as the active material in an energy storage electrode. Hybrid films of poly ortho amino phenol (POAP) and Ho2O3 were obtained through potentiodynamic deposition from solutions of ortho aminophenol and Ho2O3. The hybrid films demonstrated characteristic redox behaviors of POAP in acidic aqueous solution. Structural and morphological characterizations of Ho2O3 and composite film were carried out using powder X-ray diffraction and field emission scanning electron microscopy. Their electrochemical properties were also investigated using cyclic voltammetry, galvanostatic charge discharge and electrochemical impedance spectroscopy. Electrosynthesized composite had excellent properties in the capacitance and a columbic efficiency of 94%. This work introduces new nanocomposite materials for energy storage electrodes with advantages including ease of synthesis, high active surface area and stability in an aqueous electrolyte.