The anodic behavior of azide ions on gold and platinum electrodes in neutral electrolyte

A. Dalmia, R. F. Savinell, C. C. Liu

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The electro-oxidation of azide ions on gold and platinum electrodes in aqueous neutral media was investigated using cyclic voltammetry. Gold in the presence of azide ions undergoes electro-oxidation forming gold azide complexes above +0.1 V vs. Hg/Hg2O4. Anodic oxidation of azide ions produces gaseous products at potentials above +0.5 V vs. Hg/Hg2SO4. The formation of gold azide complexes by azide electro-oxidation at gold has been reported for the first time. On the other hand, azide ions undergo electro-oxidation at platinum electrodes and yield directly gaseous products at potentials above +0.5 V vs. Hg/Hg2SO4. This difference in the reaction mechanisms of the azide ion electro-oxidation between gold and platinum electrodes is confirmed using electron spectroscopy for chemical analysis measurements and rotating ring-disk experiments. A reaction mechanism is discussed for the electro-oxidation of the azide ions at the gold surface.

Original languageEnglish
Pages (from-to)1827-1833
Number of pages7
JournalJournal of the Electrochemical Society
Volume143
Issue number6
DOIs
StatePublished - Jun 1996

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