University of Illinois Urbana-Champaign

Magnetic Resonance at Electrified Interfaces: Study of Carbon Monoxide on Platinum

Day, James Bruce

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Description

Title
Magnetic Resonance at Electrified Interfaces: Study of Carbon Monoxide on Platinum
Author(s)
Day, James Bruce
Issue Date
1997
Doctoral Committee Chair(s)
Wieckowski, Andrzej
Department of Study
Chemistry
Discipline
Chemistry
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Electricity and Magnetism
Language
eng
Abstract
The work is concerned with CO binding to platinum in an electrochemical environment, and the development of equipment and methodology for the enhanced interface of electrochemical and NMR techniques. In this work, the author shows (using variable temperature NMR experiments) that the electrochemical oxidation process used forms CO on polycrystalline platinum powders, and the CO occupies only a single type of surface site. The activation energies for CO surface diffusion is deduced using a multi-parameter fit and the resulting variables fit nicely with what is known about the system. A comparison of results for CO on Pt at the gas/solid and solid/liquid interfaces are done. Furthermore, the improvement of the NMRE cell, which allows for simultaneous voltammetries and NMR measurements to be demonstrated by obtaining data for potential dependent chemical shifts of CO on platinum powder at room temperature. A brief synopsis of platinum NMR data is given. Finally an extensive set of materials and methodologies is presented along with descriptions of equipment required for all discussed measurements.
Graduation Semester
1997
Type of Resource
text
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