Designing efficient electrocatalytic systems through facile synthesis remains a formidable task. To address this issue, this paper presents the design of a combination material comprising two transition metal oxides (copper oxide and manganese oxide (CuO/MnO₂)), synthesized using a conventional microwave technique to efficiently engage as an active oxygen evolution reaction (OER) catalyst. The structural and morphological properties of the composite were confirmed by the aid of X-ray diffraction (XRD) studies, field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), and energy-dispersive spectrometry (EDS). FESEM clearly indicated well-aligned interlacing of CuO with MnO₂. The OER performance was carried out in 1 M KOH. The assembled CuO/MnO₂ delivered a benchmark current density (j = 10 mA cm⁻²) at a minimal overpotential (η = 294 mV), while pristine CuO required a high η (316 mV). Additionally, the CuO/MnO₂ electrocatalyst exhibited stability for more than 15 h. These enhanced electrochemical performances were attributed to the large volume and expanded diameter of the pores, which offer ample surface area for catalytic reactions to boost OER. Furthermore, the rate kinetics of the OER are favored in composite due to low Tafel slope (77 mV/dec) compared to CuO (80 mV/dec).

In present work, we synthesized the Multiwall carbon nanotube (MWCNTs)/Cd_1–x Zn _x S Nano composite (X = 0.2) using chemical co-precipitation method. The Cd_0.8Zn_0.2 nano composites were formed chemically using excess amount of N₂S solution. The morphological and chemical structures of as synthesis nano composite were characterized by Scanning Electron Microscope (SEM), Transmission Electron Microscopy (TEM), Raman Spectroscopy, X-ray Fluorescence Spectroscopy (XRF) and XRD spectra. TEM analysis confirmed uniform attached the Cd_0.8Zn_0.2S nanoparticles on highly dense tree branch like structured of MWCNTs surface. The increase in intensity ratio of D band to G-band and shift in peaks of Raman spectra of MWCNTs confirmed the functionalization of carbon nanotubes. This defines the attachment of function group and activates the defective cavities on surface of MWCNTs surface. In X-ray diffraction spectra of nanocomposites, there is no additional peak has been observed of MWCNTS, this may be attributed to the Cd_0.8Zn_0.2S wrapped along the walls of the MWCNTs. XRF analysis was revealed the energy peaks observed at 8.6 eV (K _α ) and 9.2 eV (K _β ) due to presence of Zn and peak observed at 23.1 eV (K _α ) and 26.1 eV (K _β ) shows the presence of Cd and peak at 2.3 eV (K _α ) shows the existence of sulphur in nanocomposite. These synthesized nanocomposites may be used for visible light driven Photocatalyst for hydrogen generation.