Accession Number:

ADA276705

Title:

Influence of Adsorbed Hydroxyl and Carbon Monoxide on Potential-Induced Reconstruction of Au(100) as Examined by Scanning Tunneling Microscopy

Descriptive Note:

Technical rept.

Corporate Author:

PURDUE UNIV LAFAYETTE IN DEPT OF CHEMISTRY

Report Date:

1994-02-01

Pagination or Media Count:

21.0

Abstract:

The potential-dependent hexagonal hex reconstruction of ordered Au100 in an alkaline electrolyte, 0.1 M KOH, has been examined by means of in- situ scanning tunneling microscopy. In harmony with recent X-ray diffraction results, the hex 1 x 1 transition occurs at lower potentials, ca 0 V vs SCE, than in weakly adsorbing acidic media such as perchloric acid, consistent with an influence of hydroxide adsorption. The dynamics of the reverse 1 x 1 hex transition accelerate markedly as the potential is lowered below ca -0. 35 V vs SCE. Carbon monoxide adsorption, induced in 0.1 M KOH at negative potentials, facilitates the formation of a notably homogeneous hex phase.

Subject Categories:

  • Inorganic Chemistry
  • Physical Chemistry
  • Atomic and Molecular Physics and Spectroscopy
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE