Accession Number:

AD0423570

Title:

INVESTIGATIONS OF IONIC DIFFUSION AND MIGRATION BY A ROTATING DISK ELECTRODE,

Descriptive Note:

Corporate Author:

CALIFORNIA UNIV BERKELEY

Personal Author(s):

• Gordon,Stanley Luverne

Report Date:

1963-05-15

Pagination or Media Count:

93.0

Abstract:

The hydrodynamic model of a rotating disk electode was chosen for the purpose of developing quantitative methods for the evaluation of the contribution of migration to the overall mass transport rate. When all ionic diffusivities are equal and a large excess of supporting electrolyte is present in the bulk electrolyte, the potential gradient across the boundary layer is constant. For this case, an analytical solution for the limiting current was obtained. When the concentration of the supporting electrolyte is comparable to that of the reacting ionic species, the potential gradient may not be assumed constant. Since for this condition one cannot obtain an analytical solution, it is proposed that the arithmetic average of the potential gradient in the bulk solution and at the electode-electrolyte interface may be used in the estimation of the effective transference number of the reacting species. Author

Descriptors:

• *ELECTRODES
• *DIFFUSION
• ELECTROCHEMISTRY
• IONS
• IONS
• IRON COMPOUNDS
• CYANIDES
• FUNCTIONS(MATHEMATICS)
• TABLES(DATA)
• VISCOSITY
• DENSITY
• ELECTRICAL RESISTANCE

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE