Graduate Program

Chemistry

Degree Name

Master of Science (MS)

Semester of Degree Completion

Spring 2022

Thesis Director

Zhange Feng

Thesis Committee Member

Zhiqing Yan

Thesis Committee Member

Gopal R. Periyannan

Thesis Committee Member

Michael W. Beck

Abstract

An experimental determination of RC constant at the edge and the center of a disk electrode was done using in situ reflectance spectroscopy on a Au electrode immersed in HClO4 as electrolyte. The RC constant at the edge of the disk electrode was found much smaller than that at the center. Such differences contribute to the selective removal of the deposited Cu on an Au disk electrode.

Furthermore, the electrochemical corrosion of Cu2+ towards Co electrode (called cementation reaction) was investigated using a Co/Pt rotating disk electrode. The Open Circuit Potential of Co electrode in CuSO4 electrolyte was recorded at different rotation rates. The reaction rates between Cu2+ and Co electrode were calculated under different conditions such as the thickness of Co substrate, the concentration of Cu2+ in the electrolyte, and the presence of proton (acidic media).

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