Regresar

Electrochemical impedance, cyclic voltammetry, and corrosive behavior in TiO<inf>2</inf> nanostructures

Abstract:

The use of titanium oxide nanotubes in the hydrogen evolution reaction (HER) was studied. Nanotubes were grown on titanium substrates through the anodizing process. Using the X-ray diffraction technique, the structure of the samples was determined. The surface roughness values of the samples after the anodizing process were determined by applying atomic force microscopy. The reaction kinetics were studied through electrochemical impedance spectroscopy and potentiodynamic polarization curves at repeated oxidation-reduction cycles, using a 0.5 M sulfuric acid solution as the electrolyte. Stability in contact with the solution and the establishment of a balance in the load transfer coefficients and the kinetics as a function of hydrogen production cycles were determined using electrochemical impedance spectroscopy and potentiodynamic curve techniques.