Hybrid polymer-oxide materials formed by non-stationary electrolysis as catalysts for hydrogen peroxide decomposition

Abstract

ABSTRACT Hybrid polymer-oxide materials based on transition metal oxides and polyvinylpyrrolidone have been obtained by non-stationary electrolysis on the surface of steel support. The elemental and phase compositions of the developed hybrid polymer-oxide materials have been investigated by XRF and XRD. The main phases are MoO3, MoO2, Mo18O52, Fe2O3, FeMoO4, NiMoO4, and CoMoO4. Using FT-IR spectroscopy, the incorporation of cobalt, nickel, iron, and molybdenum oxides into the structure of the polymer matrix has been proved. The surface morphology and surface height of the obtained hybrid polymer-oxide materials were reconstructed by electron microscopy and optical profilometry. Their thermal behavior was studied by comparing the DSC–TG curves of pure polyvinylpyrrolidone and the obtained hybrid polymer-oxide materials. The study of the catalytic activity in the hydrogen peroxide decomposition model reaction by the gasometric method showed that the developed hybrid polymer-oxide materials have high catalytic activity, and the presence of a polymer matrix leads to an increase in the catalytic activity of oxide phases in comparison with an oxide material of a similar composition in the absence of polymer. The study of the antibacterial activity of the obtained hybrid polymer-oxide materials showed their high efficiency against Staphylococcus aureus and Escherichia coli.