Surface Coverage and Structure of Catalytic Monolayers on Au(111) Electrodes

Finally, active molecular adsorbates are investigated. Cyclic voltammetric investigations of the α-dodecatungstosilicate anion, which has potential applications in catalysis and corrosion inhibition, indicate that it binds to the Au(111) electrode throughout the double layer potential region. At positive potentials, it delays the onset of gold oxide formation. At extreme negative electrode potentials, the anion desorbs from the surface, confirming activity observed with SPM. Quartz crystal microbalance studies found a mass change smaller than that expected for a full monolayer of α-dodecatungstosilicate anions, indicating that there is only a monolayer present on the surface and that it remains in the solution layer near the electrode surface after desorption. Finally, quartz crystal microbalance studies of uracil desorption from Au(111) in neutral solutions indicate that the desorbed mass changes linearly as a function of uracil concentration. This indicates that under these conditions uracil is actually adsorbed in a multilayer. (Abstract shortened by UMI.).

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Chemistry

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Niece, Brian Keith

Contributors dc:contributor

• Gewirth, Andrew A.

• Chemistry, Analytical

Language dc:language

eng

Identifier

(MiAaPQ)AAI9812721

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/84388