Electrochemical formation and characterization of Ag2O
The process of Ag2O formation has been investigated in 0.1 M, 0.3 M, 1.0 M and 2.0 M NaOH solutions on polycrystalline Ag electrodes by cyclic voltammetry, potentiostatic pulse and SEM techniques. The SEM micrographs of the chemically polished Ag surface and the surface after oxide formation reveale...
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2004-02-01
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| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.shd.org.yu/HtDocs/SHD/Vol69/No2/V69-No2-08.pdf |
| _version_ | 1811317481663365120 |
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| author | V. D. JOVIC B. M. JOVIC |
| author_facet | V. D. JOVIC B. M. JOVIC |
| author_sort | V. D. JOVIC |
| collection | DOAJ |
| description | The process of Ag2O formation has been investigated in 0.1 M, 0.3 M, 1.0 M and 2.0 M NaOH solutions on polycrystalline Ag electrodes by cyclic voltammetry, potentiostatic pulse and SEM techniques. The SEM micrographs of the chemically polished Ag surface and the surface after oxide formation revealed considerable roughening of the Ag surface after Ag2O formation and reduction. The roughening was more pronounced at higher NaOH concentrations, indicating that only the first cycle or pulse applied on a freshly polished Ag electrode should be considered in mechanistic studies of Ag2O formation. In the given range of NaOH concentrations, it was shown that the process is not controlled simply by the diffusion of the reacting species. A nucleation phenomenon was clearly detected in all the examined solutions. The SEM micrographs confirm that the two anodic peaks, present on the voltammograms of Ag2O formation, correspond to two types of oxide film, i.e., non-homogeneously and homogeneously distributed ones. Potentiostatic formation of the oxide at potentials corresponding to the first and second anodic peak yielded simple cubic Ag2O but of very different grain size. |
| first_indexed | 2024-04-13T12:08:50Z |
| format | Article |
| id | doaj.art-df34d4acf7b642a29e0572def4dedf39 |
| institution | Directory Open Access Journal |
| issn | 0352-5139 |
| language | English |
| last_indexed | 2024-04-13T12:08:50Z |
| publishDate | 2004-02-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-df34d4acf7b642a29e0572def4dedf392022-12-22T02:47:35ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51392004-02-01692153166Electrochemical formation and characterization of Ag2OV. D. JOVICB. M. JOVICThe process of Ag2O formation has been investigated in 0.1 M, 0.3 M, 1.0 M and 2.0 M NaOH solutions on polycrystalline Ag electrodes by cyclic voltammetry, potentiostatic pulse and SEM techniques. The SEM micrographs of the chemically polished Ag surface and the surface after oxide formation revealed considerable roughening of the Ag surface after Ag2O formation and reduction. The roughening was more pronounced at higher NaOH concentrations, indicating that only the first cycle or pulse applied on a freshly polished Ag electrode should be considered in mechanistic studies of Ag2O formation. In the given range of NaOH concentrations, it was shown that the process is not controlled simply by the diffusion of the reacting species. A nucleation phenomenon was clearly detected in all the examined solutions. The SEM micrographs confirm that the two anodic peaks, present on the voltammograms of Ag2O formation, correspond to two types of oxide film, i.e., non-homogeneously and homogeneously distributed ones. Potentiostatic formation of the oxide at potentials corresponding to the first and second anodic peak yielded simple cubic Ag2O but of very different grain size.http://www.shd.org.yu/HtDocs/SHD/Vol69/No2/V69-No2-08.pdfAg2O formation3D nucleation and growthmorphologysurface roughening |
| spellingShingle | V. D. JOVIC B. M. JOVIC Electrochemical formation and characterization of Ag2O Journal of the Serbian Chemical Society Ag2O formation 3D nucleation and growth morphology surface roughening |
| title | Electrochemical formation and characterization of Ag2O |
| title_full | Electrochemical formation and characterization of Ag2O |
| title_fullStr | Electrochemical formation and characterization of Ag2O |
| title_full_unstemmed | Electrochemical formation and characterization of Ag2O |
| title_short | Electrochemical formation and characterization of Ag2O |
| title_sort | electrochemical formation and characterization of ag2o |
| topic | Ag2O formation 3D nucleation and growth morphology surface roughening |
| url | http://www.shd.org.yu/HtDocs/SHD/Vol69/No2/V69-No2-08.pdf |
| work_keys_str_mv | AT vdjovic electrochemicalformationandcharacterizationofag2o AT bmjovic electrochemicalformationandcharacterizationofag2o |