Accession Number:

ADA191261

Title:

Surface EXAFS of Underpotentially Deposited Silver on Au (111) Electrodes.

Descriptive Note:

Interim technical rept.,

Corporate Author:

PUERTO RICO UNIV RIO PIEDRAS DEPT OF PHYSICS

Personal Author(s):

• White, J. H.
• Albarelli, M. J.
• Abruna, H. D.
• Blum, Lesser
• Melroy, O. R.

Report Date:

1988-01-28

Pagination or Media Count:

23.0

Abstract:

The fluorescence detected surface EXAFS of silver, underpotentially deposited from aqueous solutions of silver ion Perchloric acid electrolyte on Gold 111 electrodes was used to investigate the local structure of the adsorbate. Analysis of the data indicates that the silver atoms are bonded to three surface gold atoms at a distance of 2.7505A and to an oxygen atom from solvent or electrolyte at a distance of 2.4205A. These data suggest that the silver atoms sit at three-fold sited on the gold surface with water or perchlorate anion from the electrolyte bonded at a well defined distance.

Descriptors:

• *ELECTRODES
• *GOLD
• *SILVER
• ATOMS
• ELECTROLYTES
• FLUORESCENCE
• IONS
• OXYGEN
• PERCHLORIC ACID
• SOLUTIONS(MIXTURES)
• SURFACES
• WATER

Subject Categories:

• Inorganic Chemistry
• Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE