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Transient Currents of Carbon Monoxide and Methanol Adsorption on Platinum Electrodes and Determination of Composition of Chemisorption Layers

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Abstract

Transients of currents during the adsorption of CO on polycrystalline (pc) Pt in solutions of H2SO4 and H2SO4 + HCl are measured at a constant potential. The obtained values are compared with relevant reference data for Pt electrodes. Possible reasons for the established differences are discussed. Transient currents for the methanol adsorption on pcPt and Pt/Pt are compared. A method for correct determination of the composition of a chemisorption layer, which forms during dissociative adsorption of simple organic compounds of the type of RH m , is considered. Experimental data on the methanol adsorption suggest that adsorption products on pcPt are chiefly species of CO. On Pt/Pt, at low potentials, in addition to CO one should assume the adsorption of species of HCO in perceptible amounts.

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Authors and Affiliations

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

    B. I. Podlovchenko

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  1. Yu. M. Maksimov
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  2. B. I. Podlovchenko
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Maksimov, Y.M., Podlovchenko, B.I. Transient Currents of Carbon Monoxide and Methanol Adsorption on Platinum Electrodes and Determination of Composition of Chemisorption Layers. Russian Journal of Electrochemistry 40, 552–557 (2004). https://doi.org/10.1023/B:RUEL.0000027627.41772.fa

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  • DOI: https://doi.org/10.1023/B:RUEL.0000027627.41772.fa

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