Accession Number : AD0750401

Title :   Excitation at Electrodes.

Descriptive Note : Final technical rept.,

Corporate Author : GTE LABS INC WALTHAM MASS

Personal Author(s) : Haugsjaa,Paul O. ; French,Kenneth W. ; Heller,Adam

Report Date : 30 SEP 1972

Pagination or Media Count : 20

Abstract : Electronic excitation of ions in electrode reactions has been observed. Rare earth ions in solutions of phosphorus oxychloride are excited and luminescence with emission characteristic of their photoluminescence in the same solution. The emission is observed at the surface of the negative electrode. Its characteristics are best explained by a model whereby ions approaching the region of the Helmholtz double layer surrounding the electrode are excited by electrons injected into the ionic layer. The electrons which have left the high potential energy regions of the electrode interact in a region of considerably lower potential energy, allowing the excess energy to be used to excite approaching ions. With the use of this model, the ion distribution in the vicinity of the electrode may be measured. Examples of ion density profiles are given for a Tb metal-Pr(+3)/POCl3 solution interface. (Author)

Descriptors :   (*ELECTRODES, ELECTROLUMINESCENCE), (*ELECTROLUMINESCENCE, *RARE EARTH COMPOUNDS), (*ELECTROCHEMISTRY, ELECTROLUMINESCENCE), TERBIUM, SOLUTIONS(MIXTURES), SOLVENTS, PHOSPHORUS COMPOUNDS, OXYCHLORIDES, EXCITATION, ELECTRIC DOUBLE LAYER, SURFACES, IONS

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE