A. I. Danilov, E. B. Molodkina, and Yu. M. Polukarov
Institute of Physical Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 117915 Russia
Received October 22, 1995
Abstract—The initial stages of copper electrocrystallization at polycrystalline platinum in 0.01 M CuSO4 solu-
tions containing 0.5 M or 0.5 mM additives of H2SO4 are studied by chronoamperometry and cyclic voltamme-
try with a rotating ring–disk electrode. The sulfuric acid concentration is shown to affect the equilibrium poten-
tial of copper at the expense of complexing and changes in the nature of electroactive species. In weakly acid
electrolytes, adsorption of copper adatoms is enhanced, the stage of copper nuclei growth is accelerated, and
the concentration of intermediate species is diminished in the course of the deposit dissolution as a result of
changes in adsorption of anions and additional migration mass transfer.
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