Accession Number:

ADA210733

Title:

Dynamics of Nucleation at Electrochemical Interfaces via Surface EXAFS and Standing Wave Measurements

Descriptive Note:

Final rept. 1 Jun 1986-31 May 1989

Corporate Author:

CORNELL UNIV ITHACA NY BAKER LAB

Personal Author(s):

Report Date:

1989-07-11

Pagination or Media Count:

9.0

Abstract:

We have been involved in the use of x-rays as in-situ probes of electrochemical interfaces in an attempt to gain some insights as to how interfacial structure affects electrochemical reactivity. X-rays provide an ideal tool for these studies because of their short wavelength and significant propagation distances even in the presence of a condensed phase. The areas that we have emphasized are Surface EXAFS, 2. X-ray standing waves. Our work on surface EXAFS has centered on the study of the structure of underpotentially deposited metal and redox polymer films on electrodes. Underpotential deposition UPD refers to the deposition of metallic layers on an electrode of a different material. The X-ray standing wave XSW technique represents an extremely sensitive tool for determining the position of impurity atoms within a crystal or adsorbed onto crystal surfaces.

Subject Categories:

  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE