The Role of Substrate Surface Geometry in the Photo-Electrochemical Behaviour of Supported TiO₂ Nanotube Arrays: A Study Using Electrochemical Impedance Spectroscopy (EIS).

ABSTRACT: Highly ordered TiO₂ nanotube (NT) arrays grown on Ti mesh and Ti foil were successfully prepared by a controlled anodic oxidation process and tested for water photo-electrolysis. Electrochemical impedance spectroscopy (EIS), combined with other electrochemical techniques (cyclic voltammetry and chronoamperometry) in tests performed in the dark and under illumination conditions, was used to correlate the photoactivity to the specific charge transfer resistances associated with a 3D (mesh) or 2D (foil) geometry of the support. The peculiar structure of the nanotubes in the mesh (with better light absorption and faster electron transport along the nanotubes) strongly impacts the catalytic performances under illumination. H₂ production and current density in water photo-e

SUBMITTER: De Pasquale L 

PROVIDER: S-EPMC10142648 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature