Studies of the Structure and Electrocatalytic Reduction of Oxygen on Modified Electrode Surfaces

Finally, the mechanism of the electroreduction of oxygen on Au surfaces in basic media is examined using SERS and density functional theory calculations. The spectroscopy reveals superoxide species as a reduction intermediate, while no peroxide is detected. The spectroscopy also shows the presence of superoxide after the addition of hydrogen peroxide. The calculations show no effect of OH addition to the Au(100) surface with regard to O-O length. These results suggest that the four-electron reduction of O2 on Au(100) in base arises from a disproportionation mechanism, which is enhanced on Au(100) relative to the other two low Miller index faces of Au.

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

• Kim, Jongwon

Contributors dc:contributor

• Gewirth, Andrew A.

• Chemistry, Physical

Language dc:language

eng

Identifier

(MiAaPQ)AAI3199047

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/84190