Various Forms of Adsorbed Hydrogen and Their Role
in the Hydrogen Evolution Reaction and Hydrogenation
of Metallic Phases in Electrolyte Solutions

V. I. Vigdorovich and L. E. Tsygankova

Tambov State University, Tambov, Russia

E-mail: vits21@mail.ru

Received August 9, 2006

Abstract—Literature data have been considered and generalized which indicate the existence of several forms
of adsorbed hydrogen on Fe, Pt, Pd, Ir, and Rh, including two oversurface and one subsurface species, whose
properties differ substantially. It has been shown that, from the viewpoint of the existence of such forms of H_ads
and their mutual transitions into one another, a whole number of experimental data on corrosion and metal
hydrogenation in electrolytic solutions can be interpreted satisfactorily.

DOI: 10.1134/S003317320707003X

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