Electrochemical quartz crystal microbalance study of silver zeolite-modified electrodes |
Posted on:2005-07-08 | Degree:M.Sc | Type:Thesis |
University:University of Guelph (Canada) | Candidate:Xiong, Wei | Full Text:PDF |
GTID:2451390011450339 | Subject:Chemistry |
Abstract/Summary: | |
This thesis presents an investigation of the mass and electrochemical responses of gold electrode surfaces (both bare electrodes and zeolite-modified electrodes) using an electrochemical quartz crystal microbalance (EQCM). The study on bare gold electrodes demonstrates the validity of the Sauerbrey equation via the redox reaction of the Ag+/Ag couple. In-situ Ag+ ion exchange through the zeolite-modified-electrode was also detected via the quartz resonator frequency and resistance changes. A qualitative relationship between the frequency and resistance change was developed. The redox of silver through the zeolite-modified-electrodes were also studied. The electrochemical responses were detected by cyclic voltammetry (CV) and double-potential-step-chronocoulometry (DPSC). Both techniques showed a quantitative contribution of resonance resistance to frequency of approximately -5.5Hz ohm-1. |
Keywords/Search Tags: | Electrochemical, Electrodes, Quartz |
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