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Glassy carbon electrodes: II. Modification by immersion in AgNO 3

Authorized Users Only
2001
Authors
Dekanski, Aleksandar
Stevanović, Jasmina S.
Stevanović, Rade M.
Jovanović, Vladislava M.
Article (Published version)
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Abstract
The modification of glassy carbon by immersion in AgNO 3 solution was studied by cyclic voltammetry, vacuum techniques (AES and XPS) and STM. The influence of Ag + concentration, time of immersion, the presence of oxygen in AgNO 3 solution and previous thermal treatment of the glassy carbon were examined on 'as received' (untreated), polished and electrochemically treated samples. The results show that glassy carbon electrode immersed in AgNO 3 solution is modified by silver, which is deposited in its elemental state on the surface and near surface layers of the material. Cyclic voltammograms of silver-modified glassy carbon electrodes are similar to those of a silver electrode. The quantity of silver deposited on glassy carbon strongly depends on the pretreatment of the material before its immersion. The results obtained suggest that functional groups participate in the reduction of Ag + , and thus in the electrode modification, as active centers. Metal particles are not uniformly dep...osited on the surface and the deposition is 3-dimensional with deposits of laminar structure. A mechanism for the modification process is proposed.

Keywords:
Cyclic voltammetry / Auger electron spectroscopy / Carbon / Chemical modification / Chemical polishing / Electrochemical electrodes / Functional groups / Glassy carbon electrodes / Impregnation / Scanning tunneling microscopy (STM) / Silver compounds / X-ray photoelectron spectroscopy (XPS)
Source:
Carbon, 2001, 39, 8, 1207-1216
Publisher:
  • Elsevier
Funding / projects:
  • Ministry of Science and Technology of the Republic of Serbia

DOI: 10.1016/S0008-6223(00)00227-X

ISSN: 0008-6223

Scopus: 2-s2.0-0035400531
[ Google Scholar ]
36
URI
https://cer.ihtm.bg.ac.rs/handle/123456789/3660
Collections
  • Radovi istraživača / Researchers' publications
Institution/Community
IHTM
TY  - JOUR
AU  - Dekanski, Aleksandar
AU  - Stevanović, Jasmina S.
AU  - Stevanović, Rade M.
AU  - Jovanović, Vladislava M.
PY  - 2001
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3660
AB  - The modification of glassy carbon by immersion in AgNO 3 solution was studied by cyclic voltammetry, vacuum techniques (AES and XPS) and STM. The influence of Ag + concentration, time of immersion, the presence of oxygen in AgNO 3 solution and previous thermal treatment of the glassy carbon were examined on 'as received' (untreated), polished and electrochemically treated samples. The results show that glassy carbon electrode immersed in AgNO 3 solution is modified by silver, which is deposited in its elemental state on the surface and near surface layers of the material. Cyclic voltammograms of silver-modified glassy carbon electrodes are similar to those of a silver electrode. The quantity of silver deposited on glassy carbon strongly depends on the pretreatment of the material before its immersion. The results obtained suggest that functional groups participate in the reduction of Ag + , and thus in the electrode modification, as active centers. Metal particles are not uniformly deposited on the surface and the deposition is 3-dimensional with deposits of laminar structure. A mechanism for the modification process is proposed.
PB  - Elsevier
T2  - Carbon
T1  - Glassy carbon electrodes: II. Modification by immersion in AgNO 3
VL  - 39
IS  - 8
SP  - 1207
EP  - 1216
DO  - 10.1016/S0008-6223(00)00227-X
ER  - 
@article{
author = "Dekanski, Aleksandar and Stevanović, Jasmina S. and Stevanović, Rade M. and Jovanović, Vladislava M.",
year = "2001",
abstract = "The modification of glassy carbon by immersion in AgNO 3 solution was studied by cyclic voltammetry, vacuum techniques (AES and XPS) and STM. The influence of Ag + concentration, time of immersion, the presence of oxygen in AgNO 3 solution and previous thermal treatment of the glassy carbon were examined on 'as received' (untreated), polished and electrochemically treated samples. The results show that glassy carbon electrode immersed in AgNO 3 solution is modified by silver, which is deposited in its elemental state on the surface and near surface layers of the material. Cyclic voltammograms of silver-modified glassy carbon electrodes are similar to those of a silver electrode. The quantity of silver deposited on glassy carbon strongly depends on the pretreatment of the material before its immersion. The results obtained suggest that functional groups participate in the reduction of Ag + , and thus in the electrode modification, as active centers. Metal particles are not uniformly deposited on the surface and the deposition is 3-dimensional with deposits of laminar structure. A mechanism for the modification process is proposed.",
publisher = "Elsevier",
journal = "Carbon",
title = "Glassy carbon electrodes: II. Modification by immersion in AgNO 3",
volume = "39",
number = "8",
pages = "1207-1216",
doi = "10.1016/S0008-6223(00)00227-X"
}
Dekanski, A., Stevanović, J. S., Stevanović, R. M.,& Jovanović, V. M.. (2001). Glassy carbon electrodes: II. Modification by immersion in AgNO 3. in Carbon
Elsevier., 39(8), 1207-1216.
https://doi.org/10.1016/S0008-6223(00)00227-X
Dekanski A, Stevanović JS, Stevanović RM, Jovanović VM. Glassy carbon electrodes: II. Modification by immersion in AgNO 3. in Carbon. 2001;39(8):1207-1216.
doi:10.1016/S0008-6223(00)00227-X .
Dekanski, Aleksandar, Stevanović, Jasmina S., Stevanović, Rade M., Jovanović, Vladislava M., "Glassy carbon electrodes: II. Modification by immersion in AgNO 3" in Carbon, 39, no. 8 (2001):1207-1216,
https://doi.org/10.1016/S0008-6223(00)00227-X . .

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