Influence of a near-electrode layer thickness on the diffusion impedance

Pototskaya, VV, 1Gichan, OI, Skryptun, IN, Omel'chuk, AA
1O. O. Chuiko Institute of Surface Chemistry of the NAS of Ukraine, Kyiv
Dopov. Nac. akad. nauk Ukr. 2018, 1:34-42
Section: Physics
Language: Ukrainian

It is shown that the impedance of a near-electrode layer increases with the thickness of the Nernst diffusion layer. A qualitative estimation of the phase angle of the diffusion impedance depending on the frequency at different diffusion layer thicknesses is obtained. It is shown that the diffusion is a reason for a delay in the phase of changes in the surface concentration of species with respect to the current.

Keywords: diffusion impedance, impedance spectroscopy, mass transfer, Nernst diffusion layer, oscillatory diffusion layer, phase angle
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