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The Anodic Behavior of Hydrogenated Copper in Sodium Hydroxide Solutions |
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30.09.2008 г. |
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The Anodic Behavior of Hydrogenated Copper in Sodium Hydroxide Solutions D. S. Sirota and A. P. Pchel’nikov Karpov Research Institute of Physical Chemistry (Russian State Scientific Center),
ul. Vorontsovo pole 10, Moscow, 103064 Russia e-mail:
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Received June 6, 2004 Abstract — The anodic behavior of cathodically hydrogenated copper in 1 N NaOH solution is investigated with the use of its free-corrosion chronopotentiometry (Ecor) and cyclic voltammetry (CVA). The former proves that while being cathodically hydrogenated, copper, unlike nickel, does not form hydride. An analysis of the CVAs shows that during anodic dissolution of hydrogenated copper, two forms of adsorbed hydrogen are ionized, while the ionization is limited by the diffusion in solid phase. Under the same hydrogenation conditions, copper sorbs ten times less hydrogen than nickel does.
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