Accession Number:

ADA196009

Title:

Mass Measurements Using Isotopically Labeled Solvents Reveal the Extent of Solvent Transport during Redox in Thin Films on Electrodes

Descriptive Note:

Technical rept. no. 1, Sep 1987-Jun 1988

Corporate Author:

WYOMING UNIV LARAMIE DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1988-07-06

Pagination or Media Count:

16.0

Abstract:

Thin films of nickel ferrocyanide are grown at nickel electrode surfaces by electrochemical oxidative treatment. This report describes some new microgravimetric, quartz crystal microbalance QCM experiments using isotopically substituted solvents which detail the transport of solvent during the redox process of the Fe sites. The results show that solvent incorporation accompanies cesium ion expulsion during oxidation, and vice versa during reduction. The relationship between the numbers of moles of expelled cesium ions and incorporated water molecules indicates that considerable void space exists within the lattice of the reduced form of the metallocyanide film as a result of a discreteness of size effect. To our knowledge, these experiments represent the first accurate, unambiguous measurements of solvent transport in thin films on electrodes. Keywords Electrochemistry, Quartz crystal microbalance, Modified electrode.

Subject Categories:

  • Inorganic Chemistry
  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE