Electrochemistry of fuel cell electrodes. Interfacial tension of indium amalgams in 0.1 MHC104 at 25 C.

Abstract

A method is described for determining interfacial tension by firing a theoretical curve to the experimentally-measured shape of a sessile differential equation describing the drop shape. Absolute measurements of interfacial tension for amalgams containing up to 64 mole % indium were made in 0.1 M HClO4 at 25 C. These were combined with previously measured values of zero-charge potential and differential capacity, to generate a familiy of electrocapillary curves from which the surface excess was calculated using the Gibbs equation. The surface excess is negative, and passes through a maximum negative value at approximately 20 mole % indium. The parameters of the hydrogen evolution reaction on indium amalgams correlate with the bulk electronic properties of the amalgams, but not with the surface composition. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1965
Accession Number
AD0462038

Entities

People

  • James N. Butler

Tags

DTIC Thesaurus Topics

  • Cells
  • Differential Equations
  • Electrochemistry
  • Electrodes
  • Equations
  • Fuel Cells
  • Hydrogen
  • Mathematics
  • Measurement
  • Personal Information Managers
  • Surface Tension

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Mechanical Engineering/Mechanics of Materials.

Technology Areas

  • Biotechnology
  • Microelectronics