Impedance spectra of Pt(100) in aqueous H 2SO 4 and HCl solutions around the hydrogen adsorption-desorption peak

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Abstract

Impedance spectra of Pt(100) in aqueous 0.5M H 2SO 4 and 1M 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.

Original languageEnglish
Pages (from-to)935-943
Number of pages9
JournalZeitschrift fur Physikalische Chemie
Volume226
Issue number9-10
DOIs
Publication statusPublished - Oct 2012

Fingerprint

Hydrogen
Desorption
Capacitance
capacitance
desorption
impedance
Adsorption
adsorption
hydrogen
Surface charge
Sulfates
Anions
Chlorides
sulfates
chlorides
anions

Keywords

  • Adsorption
  • Capacitance
  • Charge
  • Double Layer
  • Interface
  • Platinum
  • pzc

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

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abstract = "Impedance spectra of Pt(100) in aqueous 0.5M H 2SO 4 and 1M 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 = "Adsorption, Capacitance, Charge, Double Layer, Interface, Platinum, pzc",
author = "Tam{\'a}s Pajkossy",
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language = "English",
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T1 - Impedance spectra of Pt(100) in aqueous H 2SO 4 and HCl solutions around the hydrogen adsorption-desorption peak

AU - Pajkossy, Tamás

PY - 2012/10

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N2 - Impedance spectra of Pt(100) in aqueous 0.5M H 2SO 4 and 1M 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.

AB - Impedance spectra of Pt(100) in aqueous 0.5M H 2SO 4 and 1M 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.

KW - Adsorption

KW - Capacitance

KW - Charge

KW - Double Layer

KW - Interface

KW - Platinum

KW - pzc

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JO - Zeitschrift fur Physikalische Chemie

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