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Zeitschrift für Physikalische Chemie

International journal of research in physical chemistry and chemical physics

Editor-in-Chief: Rademann, Klaus

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Volume 226, Issue 9-10


Impedance Spectra of Pt(100) in Aqueous H2SO4 and HCl Solutions Around the Hydrogen Adsorption-Desorption Peak

Tamás Pajkossy
Published Online: 2012-09-24 | DOI: https://doi.org/10.1524/zpch.2012.0243


Impedance spectra of Pt(100) in aqueous 0.5 M H2SO4 and 1 M HCl solutions have been measured in a potential range which includes the hydrogen adsorption/desorption peak and the double layer region. In the latter potential region the positive surface charge and the large dc capacitance imply that the double layer consist mostly of adsorbed anions; the capacitance spectra are markedly different for the two systems, revealing that adsorption/desorption is much faster for sulphate than for chloride.

Keywords: Interface; Adsorption; Double Layer; Capacitance; Charge

About the article

* Correspondence address: Hungarian Academy of Sciences, Institute of Materials and Environmental Chemistry, Pusztaszeri út 59-67, Research Centre for Natural Sciences, H1025 Budapest, Ungarn,

Published Online: 2012-09-24

Published in Print: 2012-10-01

Citation Information: Zeitschrift für Physikalische Chemie, Volume 226, Issue 9-10, Pages 935–943, ISSN (Online) 2196-7156, ISSN (Print) 0942-9352, DOI: https://doi.org/10.1524/zpch.2012.0243.

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