Electrochemical Performance of Green-Synthesized CoNiO₂ and NdNiO₃ Nanocomposites for Cyclic Voltammetry

Abstract

Using a straightforward hydrothermal synthesis technique, cobalt nickel oxide (CoNiO₂) and neodymium nickel oxide (NdNiO₃) nanocomposites were effectively created. A variety of analytical methods, such as X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and UV-visible diffuse reflectance spectroscopy (UV-DRS), were used to thoroughly examine these nanocomposites. For NiO, CoNiO₂, and NdNiO₃, the observed crystallite sizes were around 43.5 nm, 46.3 nm, and 56.2 nm, respectively. Different morphological characteristics were discovered by SEM examination; NdNiO₃ had a distinctive flower-like morphology, whereas CoNiO₂ displayed an agglomerated structure. Using the Kubelka-Munk method on UV-DRS data, the optical band gaps were determined to be 3.0 eV for CoNiO₂ and 2.7 eV for NdNiO₃. Both nanocomposites were subjected to electrochemical performance experiments; NdNiO₃ demonstrated better electrochemical behaviour than CoNiO₂.