Experimental evidence demonstrating the occurrence of reduction processes of ClO4 - ions in an acid medium at platinized platinum electrodes

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Abstract

It has been shown that an unexpected cathodic current appears during some cyclic voltammetric, voltradiometric and transient measurements at platinized electrodes carried out in the presence of HClO4 supporting electrolytes. The distortion of voltammetric behaviour depends strongly upon the concentration of HClO4 and the sweep rate. The observed phenomena can be almost completely eliminated by addition of HSO4 - or Cl- ions to the solution phase. Radiotracer adsorption studies show that the adsorption of these anions plays a dominant role in the inhibition process. The phenomena observed are explained by the assumption that the reduction of adsorbed ClO4 - ions takes place in a wide potential range under certain experimental conditions.

Original languageEnglish
Pages (from-to)727-737
Number of pages11
JournalJournal of Electroanalytical Chemistry
Volume331
Issue number1-2
DOIs
Publication statusPublished - 1992

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Platinum
Ions
Adsorption
Electrodes
Acids
Electrolytes
Anions
Negative ions
perchlorate

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

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title = "Experimental evidence demonstrating the occurrence of reduction processes of ClO4 - ions in an acid medium at platinized platinum electrodes",
abstract = "It has been shown that an unexpected cathodic current appears during some cyclic voltammetric, voltradiometric and transient measurements at platinized electrodes carried out in the presence of HClO4 supporting electrolytes. The distortion of voltammetric behaviour depends strongly upon the concentration of HClO4 and the sweep rate. The observed phenomena can be almost completely eliminated by addition of HSO4 - or Cl- ions to the solution phase. Radiotracer adsorption studies show that the adsorption of these anions plays a dominant role in the inhibition process. The phenomena observed are explained by the assumption that the reduction of adsorbed ClO4 - ions takes place in a wide potential range under certain experimental conditions.",
author = "G. Hor{\'a}nyi and I. Bakos",
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T1 - Experimental evidence demonstrating the occurrence of reduction processes of ClO4 - ions in an acid medium at platinized platinum electrodes

AU - Horányi, G.

AU - Bakos, I.

PY - 1992

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N2 - It has been shown that an unexpected cathodic current appears during some cyclic voltammetric, voltradiometric and transient measurements at platinized electrodes carried out in the presence of HClO4 supporting electrolytes. The distortion of voltammetric behaviour depends strongly upon the concentration of HClO4 and the sweep rate. The observed phenomena can be almost completely eliminated by addition of HSO4 - or Cl- ions to the solution phase. Radiotracer adsorption studies show that the adsorption of these anions plays a dominant role in the inhibition process. The phenomena observed are explained by the assumption that the reduction of adsorbed ClO4 - ions takes place in a wide potential range under certain experimental conditions.

AB - It has been shown that an unexpected cathodic current appears during some cyclic voltammetric, voltradiometric and transient measurements at platinized electrodes carried out in the presence of HClO4 supporting electrolytes. The distortion of voltammetric behaviour depends strongly upon the concentration of HClO4 and the sweep rate. The observed phenomena can be almost completely eliminated by addition of HSO4 - or Cl- ions to the solution phase. Radiotracer adsorption studies show that the adsorption of these anions plays a dominant role in the inhibition process. The phenomena observed are explained by the assumption that the reduction of adsorbed ClO4 - ions takes place in a wide potential range under certain experimental conditions.

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