Combined radiometric and electrochemical study of the behaviour of Tc (vii) ions at gold and platinized surfaces in acidic media

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Abstract

The sorption and deposition of technetium species formed from TcO4- at gold and platinized surfaces was followed by a coupled in situ radiometric and electrochemical technique. It was found: (i) that a layer of TcO2 species is formed preceding the massive deposition of technetium species, and (ii) that the deposition process is not connected with hydrogen evolution or reaction with adsorbed hydrogen as has been assumed in the literature. An important new finding, the electrocatalytic reduction of ClO4 ions at surfaces covered by technetium species, was demonstrated on the basis of a comparative study of the phenomena observed in H2SO4 and HClO4 supporting electrolytes.

Original languageEnglish
Pages (from-to)547-552
Number of pages6
JournalJournal of Applied Electrochemistry
Volume23
Issue number6
DOIs
Publication statusPublished - Jun 1993

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Technetium
Gold
Ions
Hydrogen
Electrolytes
Sorption

ASJC Scopus subject areas

  • Electrochemistry

Cite this

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abstract = "The sorption and deposition of technetium species formed from TcO4- at gold and platinized surfaces was followed by a coupled in situ radiometric and electrochemical technique. It was found: (i) that a layer of TcO2 species is formed preceding the massive deposition of technetium species, and (ii) that the deposition process is not connected with hydrogen evolution or reaction with adsorbed hydrogen as has been assumed in the literature. An important new finding, the electrocatalytic reduction of ClO4 ions at surfaces covered by technetium species, was demonstrated on the basis of a comparative study of the phenomena observed in H2SO4 and HClO4 supporting electrolytes.",
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T1 - Combined radiometric and electrochemical study of the behaviour of Tc (vii) ions at gold and platinized surfaces in acidic media

AU - Horányi, G.

AU - Bakos, I.

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N2 - The sorption and deposition of technetium species formed from TcO4- at gold and platinized surfaces was followed by a coupled in situ radiometric and electrochemical technique. It was found: (i) that a layer of TcO2 species is formed preceding the massive deposition of technetium species, and (ii) that the deposition process is not connected with hydrogen evolution or reaction with adsorbed hydrogen as has been assumed in the literature. An important new finding, the electrocatalytic reduction of ClO4 ions at surfaces covered by technetium species, was demonstrated on the basis of a comparative study of the phenomena observed in H2SO4 and HClO4 supporting electrolytes.

AB - The sorption and deposition of technetium species formed from TcO4- at gold and platinized surfaces was followed by a coupled in situ radiometric and electrochemical technique. It was found: (i) that a layer of TcO2 species is formed preceding the massive deposition of technetium species, and (ii) that the deposition process is not connected with hydrogen evolution or reaction with adsorbed hydrogen as has been assumed in the literature. An important new finding, the electrocatalytic reduction of ClO4 ions at surfaces covered by technetium species, was demonstrated on the basis of a comparative study of the phenomena observed in H2SO4 and HClO4 supporting electrolytes.

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