Abstract
The effect of solution pH and the presence of pyridine on the redox behavior of Ag electrodes in aqueous chloride media is investigated. Scanning electron microscopy is used to evaluate differences in surface morphology of Ag electrodes subjected to electrochemical oxidation and oxidation-reduction processes in 0.1 M KCl and 0.1 M KCl + 0.05 M pyridine media at pH values of 2, 7, and 12. Potential sweep and potential step methods are used to effect the electrochemical oxidation and oxidation-reduction events. Comparisons are made between the resulting surface morphologies on the submicroscopic level for Ag surfaces roughened in these two ways. The redox chemistry of the oxidation and reduction processes is interpreted in terms of the different species capable of interacting with the Ag electrode surface and Ag+ species generated during oxidation in each medium. Surface adsorbates proposed to be important include chloride ions and pyridine. The relative importance of these species in terms of their ability to influence the redox chemistry of the Ag electrodes is seen to be a sensitive function of solution pH.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 79-92 |
| Number of pages | 14 |
| Journal | Journal of Electroanalytical Chemistry |
| Volume | 217 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 23 1987 |
Fingerprint
ASJC Scopus subject areas
- Chemical Engineering(all)
- Analytical Chemistry
- Electrochemistry
Cite this
Electrochemical and sem characterization of Ag electrodes roughened by potential sweep and potential step processes in aqueous chloride and chloride + pyridine media. / Pemberton, Jeanne E; Girand, Maureen M.
In: Journal of Electroanalytical Chemistry, Vol. 217, No. 1, 23.01.1987, p. 79-92.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrochemical and sem characterization of Ag electrodes roughened by potential sweep and potential step processes in aqueous chloride and chloride + pyridine media
AU - Pemberton, Jeanne E
AU - Girand, Maureen M.
PY - 1987/1/23
Y1 - 1987/1/23
N2 - The effect of solution pH and the presence of pyridine on the redox behavior of Ag electrodes in aqueous chloride media is investigated. Scanning electron microscopy is used to evaluate differences in surface morphology of Ag electrodes subjected to electrochemical oxidation and oxidation-reduction processes in 0.1 M KCl and 0.1 M KCl + 0.05 M pyridine media at pH values of 2, 7, and 12. Potential sweep and potential step methods are used to effect the electrochemical oxidation and oxidation-reduction events. Comparisons are made between the resulting surface morphologies on the submicroscopic level for Ag surfaces roughened in these two ways. The redox chemistry of the oxidation and reduction processes is interpreted in terms of the different species capable of interacting with the Ag electrode surface and Ag+ species generated during oxidation in each medium. Surface adsorbates proposed to be important include chloride ions and pyridine. The relative importance of these species in terms of their ability to influence the redox chemistry of the Ag electrodes is seen to be a sensitive function of solution pH.
AB - The effect of solution pH and the presence of pyridine on the redox behavior of Ag electrodes in aqueous chloride media is investigated. Scanning electron microscopy is used to evaluate differences in surface morphology of Ag electrodes subjected to electrochemical oxidation and oxidation-reduction processes in 0.1 M KCl and 0.1 M KCl + 0.05 M pyridine media at pH values of 2, 7, and 12. Potential sweep and potential step methods are used to effect the electrochemical oxidation and oxidation-reduction events. Comparisons are made between the resulting surface morphologies on the submicroscopic level for Ag surfaces roughened in these two ways. The redox chemistry of the oxidation and reduction processes is interpreted in terms of the different species capable of interacting with the Ag electrode surface and Ag+ species generated during oxidation in each medium. Surface adsorbates proposed to be important include chloride ions and pyridine. The relative importance of these species in terms of their ability to influence the redox chemistry of the Ag electrodes is seen to be a sensitive function of solution pH.
UR - http://www.scopus.com/inward/record.url?scp=0010514804&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0010514804&partnerID=8YFLogxK
U2 - 10.1016/0022-0728(87)85065-9
DO - 10.1016/0022-0728(87)85065-9
M3 - Article
AN - SCOPUS:0010514804
VL - 217
SP - 79
EP - 92
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
SN - 0022-0728
IS - 1
ER -