University of Illinois Urbana-Champaign

Correlation of Structure and Electrochemical Reactivity at Underpotentially Deposited Modified Gold(111) Surfaces

Hsieh, Show-Jon

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Description

Title
Correlation of Structure and Electrochemical Reactivity at Underpotentially Deposited Modified Gold(111) Surfaces
Author(s)
Hsieh, Show-Jon
Issue Date
2001
Doctoral Committee Chair(s)
Gewirth, Andrew A.
Department of Study
Chemistry
Discipline
Chemistry
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Chemistry, Physical
Language
eng
Abstract
Reactivity studies of the effect of SCN-, a weaker anion than I-, on the peroxide reduction catalyzed by Pb underpotential deposition (upd) on Au(111) revealed that SCN- decreases the catalytic peroxide reduction activity. The decrease in reactivity due to SCN- exhibited Langmuir behavior. STM studies reveal that islands of two different heights emerge following addition of SCN-. One type of islands is of the same composition prior to SCN- addition. The other type of island exhibits open Pb structures resulting from Pb and SCN- interactions. The open Pb structure exhibits a linear motif, a pattern that is uncommon among upd systems on hexagonal substrates.
Graduation Semester
2001
Type of Resource
text
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http://hdl.handle.net/2142/84041

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