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Adsorption Peculiarities of Carbon Monoxide on Iridium Electrodeposits

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Abstract

The transients of current and open-circuit potential observed at CO adsorption on Ir/Pt electrodes in solutions of sulfuric and hydrochloric acids are shown to adequately agree with those theoretically expected. From voltammetric curves of electrooxidation of chemisorbed CO, the values of its adsorption are estimated by making a “proper double-layer correction.” It is concluded that CO is preferentially adsorbed in the bridge form. During CO adsorption from sulfuric acid solutions on an electrode with a preliminarily accumulated monolayer of copper adatoms (Cuad), small negative current are observed and Cuad are displaced by ∼50%. To explain these results, it is assumed that CO is reduced by copper adatoms.

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Authors and Affiliations

  1. Chemistry Faculty, Moscow State University, Vorob'evy Gory, Moscow, 119992, Russia

    T. D. Gladysheva & B. I. Podlovchenko

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  1. T. D. Gladysheva
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  2. B. I. Podlovchenko
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Correspondence to B. I. Podlovchenko.

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Gladysheva, T.D., Podlovchenko, B.I. Adsorption Peculiarities of Carbon Monoxide on Iridium Electrodeposits. Russian Journal of Electrochemistry 39, 796–801 (2003). https://doi.org/10.1023/A:1024842522545

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