The kinetics of the electrochemical reduction of perchlorate ions on rhodium

G. Láng, Norbert S. Sas, M. Újvári, G. Horányi

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The reduction of ClO4- ions in acid media was studied at smooth polycrystalline rhodium electrodes by voltammetry, chronoamperometry and impedance spectroscopy. On the basis of the experimental results, a new mechanism for the electrocatalytic reduction of ClO4- ions has been proposed. According to this reaction scheme, the reduction process is starting with the adsorption of perchlorate ions at free active sites on the metal surface. It is also assumed that the whole process starting from perchlorate ion occurs on the surface and the role of desorption of intermediates can be neglected. On the basis of the kinetic model an expression has been derived for the impedance of the electrode, which fits the experimental data quite well.

Original languageEnglish
Pages (from-to)7436-7444
Number of pages9
JournalElectrochimica Acta
Volume53
Issue number25
DOIs
Publication statusPublished - Oct 30 2008

Fingerprint

Rhodium
Kinetics
Ions
Chronoamperometry
Electrodes
Voltammetry
Desorption
Metals
Spectroscopy
Adsorption
Acids
perchlorate

Keywords

  • Electrochemical impedance spectroscopy
  • Perchlorate ions
  • Reduction
  • Rhodium
  • Rotating disc electrode

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

The kinetics of the electrochemical reduction of perchlorate ions on rhodium. / Láng, G.; Sas, Norbert S.; Újvári, M.; Horányi, G.

In: Electrochimica Acta, Vol. 53, No. 25, 30.10.2008, p. 7436-7444.

Research output: Contribution to journalArticle

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