Study of the relationship between voltammetric behaviour and electrocatalytic activity in the reduction of ClO4 - ions at platinized platinum electrodes

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Abstract

Cyclic voltammetric measurements were carried out with various Pt/Pt electrodes in 3 mol dm-3 HClO4 and 0.5 mol dm-3 H2SO4 electrolytes in order to find a relationship between their voltammetric behaviour in H2SO4 and their activity for the electrocatalytic reduction of ClO4 - ions. It was found that the catalytic activity of a platinized electrode, in the reaction studied, depends strongly on the parameters of the platinization method used in its preparation. However, this behaviour cannot be correlated with the height or position of the hydrogen adsorption peaks observed in H2SO4 solution as very different catalytic activity was found in the case of almost similar voltammetric behaviour. It was shown that alternating anodic-cathodic treatments (between 0.05 and 1.4 V) of the various electrodes "equalize" their voltammetric behaviour and at the same time minimize their electrocatalytic activity. This phenomenon explains why the electrocatalytic reduction of ClO4 - ions escaped the attention of many workers.

Original languageEnglish
Pages (from-to)383-391
Number of pages9
JournalJournal of Electroanalytical Chemistry
Volume347
Issue number1-2
DOIs
Publication statusPublished - Apr 2 1993

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Platinum
Ions
Electrodes
Catalyst activity
Electrolytes
Hydrogen
Adsorption
perchlorate

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

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title = "Study of the relationship between voltammetric behaviour and electrocatalytic activity in the reduction of ClO4 - ions at platinized platinum electrodes",
abstract = "Cyclic voltammetric measurements were carried out with various Pt/Pt electrodes in 3 mol dm-3 HClO4 and 0.5 mol dm-3 H2SO4 electrolytes in order to find a relationship between their voltammetric behaviour in H2SO4 and their activity for the electrocatalytic reduction of ClO4 - ions. It was found that the catalytic activity of a platinized electrode, in the reaction studied, depends strongly on the parameters of the platinization method used in its preparation. However, this behaviour cannot be correlated with the height or position of the hydrogen adsorption peaks observed in H2SO4 solution as very different catalytic activity was found in the case of almost similar voltammetric behaviour. It was shown that alternating anodic-cathodic treatments (between 0.05 and 1.4 V) of the various electrodes {"}equalize{"} their voltammetric behaviour and at the same time minimize their electrocatalytic activity. This phenomenon explains why the electrocatalytic reduction of ClO4 - ions escaped the attention of many workers.",
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TY - JOUR

T1 - Study of the relationship between voltammetric behaviour and electrocatalytic activity in the reduction of ClO4 - ions at platinized platinum electrodes

AU - Bakos, I.

AU - Horányi, G.

PY - 1993/4/2

Y1 - 1993/4/2

N2 - Cyclic voltammetric measurements were carried out with various Pt/Pt electrodes in 3 mol dm-3 HClO4 and 0.5 mol dm-3 H2SO4 electrolytes in order to find a relationship between their voltammetric behaviour in H2SO4 and their activity for the electrocatalytic reduction of ClO4 - ions. It was found that the catalytic activity of a platinized electrode, in the reaction studied, depends strongly on the parameters of the platinization method used in its preparation. However, this behaviour cannot be correlated with the height or position of the hydrogen adsorption peaks observed in H2SO4 solution as very different catalytic activity was found in the case of almost similar voltammetric behaviour. It was shown that alternating anodic-cathodic treatments (between 0.05 and 1.4 V) of the various electrodes "equalize" their voltammetric behaviour and at the same time minimize their electrocatalytic activity. This phenomenon explains why the electrocatalytic reduction of ClO4 - ions escaped the attention of many workers.

AB - Cyclic voltammetric measurements were carried out with various Pt/Pt electrodes in 3 mol dm-3 HClO4 and 0.5 mol dm-3 H2SO4 electrolytes in order to find a relationship between their voltammetric behaviour in H2SO4 and their activity for the electrocatalytic reduction of ClO4 - ions. It was found that the catalytic activity of a platinized electrode, in the reaction studied, depends strongly on the parameters of the platinization method used in its preparation. However, this behaviour cannot be correlated with the height or position of the hydrogen adsorption peaks observed in H2SO4 solution as very different catalytic activity was found in the case of almost similar voltammetric behaviour. It was shown that alternating anodic-cathodic treatments (between 0.05 and 1.4 V) of the various electrodes "equalize" their voltammetric behaviour and at the same time minimize their electrocatalytic activity. This phenomenon explains why the electrocatalytic reduction of ClO4 - ions escaped the attention of many workers.

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