Voltammetric studies of silane-modified SnO2 surfaces in selected aqueous and non-aqueous media

Neal R. Armstrong, V. Rogers Shepard

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

Voltammetric studies in selected aqueous and non-aqueous media were conducted for a series of silane-modified SnO2 electrodes which had been further modified with a variety of metal phthalocyanines and metal cations. It is shown that tetrasulfonated, transitionmetal phthalocyanines can be both adsorbed and covalently attached to silane-modified surfaces where the silane has a coordinating ligand functionality such as a primary or secondary amine. It is further shown that the presence of the silane on the SnO2 surface causes the appearance of a reversible voltammetric process following exposure of the surface to solution cation species. This reversible voltammetric wave is hypothesized to be due to the reduction of a surface bound Sn(IV) species to Sn(II) in a strongly hydroxylated environment.

Original languageEnglish (US)
Pages (from-to)253-265
Number of pages13
JournalJournal of Electroanalytical Chemistry
Volume115
Issue number2
DOIs
StatePublished - Dec 23 1980

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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