NDLI: Kinetics of the formation of gas bubbles during polarization of copper and graphite electrodes in electrolytic aqueous solutions

Content Provider	Springer Nature Link
Author	Orlov, A. M. Yavtushenko, I. O. Churilov, M. V.
Copyright Year	2010
Abstract	The adsorption and kinetic processes of the formation of gas bubbles passivating the surface during polarization of copper and graphite electrodes in 1% aqueous solution of sulfuric acid have been investigated. Three stages of the process related to the recharging of the double electric layer—adsorption accumulation of the gas escaping from the surface, the critical nucleation of the gas bubbles, and their subsequent growth—have been revealed, distinguished, and quantitatively estimated. It has been shown that potential leveling at the steady-state value specified by the Tafel equation is unambiguously associated with achievement of the limiting surface area screened by the gas bubbles for each particular current density. The surface diffusion constants D $_{H}$ = (1.5–4.4) × 10$^{−4}$ and (0.1–3.8) × 10$^{−5}$ cm$^{2}$/s of hydrogen on copper and graphite, respectively, and D $_{O}$ = (1.8–4.5) × 10$^{−7}$ cm$^{2}$/s of oxygen on graphite during the motion toward the drain (the gas bubbles) have been calculated.
Starting Page	831
Ending Page	835
Page Count	5
File Format	PDF
ISSN	10274510
Journal	Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques
Volume Number	4
Issue Number	5
e-ISSN	18197094
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2010-10-12
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Surfaces and Interfaces, Thin Films
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Surfaces, Coatings and Films

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