Buoyancy Effect of Ionic Vacancy on the Change of the Partial Molar Volume in Ferricyanide-Ferrocyanide Redox Reaction under a Vertical Gravity Field
With a gravity electrode (GE) in a vertical gravity field, the buoyancy effect of ionic vacancy on the change of the partial molar volume in the redox reaction between ferricyanide (FERRI) and ferrocyanide (FERRO) ions was examined. The buoyancy force of ionic vacancy takes a positive or negative va...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | International Journal of Electrochemistry |
| Online Access: | http://dx.doi.org/10.1155/2013/610310 |
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| author | Yoshinobu Oshikiri Makoto Miura Ryoichi Aogaki |
| author_facet | Yoshinobu Oshikiri Makoto Miura Ryoichi Aogaki |
| author_sort | Yoshinobu Oshikiri |
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| description | With a gravity electrode (GE) in a vertical gravity field, the buoyancy effect of ionic vacancy on the change of the partial molar volume in the redox reaction between ferricyanide (FERRI) and ferrocyanide (FERRO) ions was examined. The buoyancy force of ionic vacancy takes a positive or negative value, depending on whether the rate-determining step is the production or extinction of the vacancy. Though the upward convection over an upward electrode in the FERRO ion oxidation suggests the contribution of the positive buoyancy force arising from the vacancy production, the partial molar volume of the vacancy was not measured. On the other hand, for the downward convection under a downward electrode in the FERRI ion reduction, it was not completely but partly measured by the contribution of the negative buoyancy force from the vacancy extinction. Since the lifetime of the vacancy is decreased by the collision between ionic vacancies during the convection, the former result was ascribed to the shortened lifetime due to the increasing collision efficiency in the enhanced upward convection over an upward electrode, whereas the latter was thought to arise from the elongated lifetime due to the decreasing collision efficiency by the stagnation under the downward electrode. |
| format | Article |
| id | doaj-art-3df2f35c76bd4caab4f66dbcc6e7da65 |
| institution | Kabale University |
| issn | 2090-3529 2090-3537 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Electrochemistry |
| spelling | doaj-art-3df2f35c76bd4caab4f66dbcc6e7da652025-08-20T03:55:40ZengWileyInternational Journal of Electrochemistry2090-35292090-35372013-01-01201310.1155/2013/610310610310Buoyancy Effect of Ionic Vacancy on the Change of the Partial Molar Volume in Ferricyanide-Ferrocyanide Redox Reaction under a Vertical Gravity FieldYoshinobu Oshikiri0Makoto Miura1Ryoichi Aogaki2Yamagata College of Industry & Technology, Department of Environmental Engineering, 2-2-1, Matsuei, Yamagata, Yamagata 990-2473, JapanPolytechnic College Akita, 6-1, Ohgida-michishita, Ohdate, Akita 017-0805, JapanPolytechnic University, 2-20-12-1304, Ryogoku, Sumida-ku, Tokyo 130-0026, JapanWith a gravity electrode (GE) in a vertical gravity field, the buoyancy effect of ionic vacancy on the change of the partial molar volume in the redox reaction between ferricyanide (FERRI) and ferrocyanide (FERRO) ions was examined. The buoyancy force of ionic vacancy takes a positive or negative value, depending on whether the rate-determining step is the production or extinction of the vacancy. Though the upward convection over an upward electrode in the FERRO ion oxidation suggests the contribution of the positive buoyancy force arising from the vacancy production, the partial molar volume of the vacancy was not measured. On the other hand, for the downward convection under a downward electrode in the FERRI ion reduction, it was not completely but partly measured by the contribution of the negative buoyancy force from the vacancy extinction. Since the lifetime of the vacancy is decreased by the collision between ionic vacancies during the convection, the former result was ascribed to the shortened lifetime due to the increasing collision efficiency in the enhanced upward convection over an upward electrode, whereas the latter was thought to arise from the elongated lifetime due to the decreasing collision efficiency by the stagnation under the downward electrode.http://dx.doi.org/10.1155/2013/610310 |
| spellingShingle | Yoshinobu Oshikiri Makoto Miura Ryoichi Aogaki Buoyancy Effect of Ionic Vacancy on the Change of the Partial Molar Volume in Ferricyanide-Ferrocyanide Redox Reaction under a Vertical Gravity Field International Journal of Electrochemistry |
| title | Buoyancy Effect of Ionic Vacancy on the Change of the Partial Molar Volume in Ferricyanide-Ferrocyanide Redox Reaction under a Vertical Gravity Field |
| title_full | Buoyancy Effect of Ionic Vacancy on the Change of the Partial Molar Volume in Ferricyanide-Ferrocyanide Redox Reaction under a Vertical Gravity Field |
| title_fullStr | Buoyancy Effect of Ionic Vacancy on the Change of the Partial Molar Volume in Ferricyanide-Ferrocyanide Redox Reaction under a Vertical Gravity Field |
| title_full_unstemmed | Buoyancy Effect of Ionic Vacancy on the Change of the Partial Molar Volume in Ferricyanide-Ferrocyanide Redox Reaction under a Vertical Gravity Field |
| title_short | Buoyancy Effect of Ionic Vacancy on the Change of the Partial Molar Volume in Ferricyanide-Ferrocyanide Redox Reaction under a Vertical Gravity Field |
| title_sort | buoyancy effect of ionic vacancy on the change of the partial molar volume in ferricyanide ferrocyanide redox reaction under a vertical gravity field |
| url | http://dx.doi.org/10.1155/2013/610310 |
| work_keys_str_mv | AT yoshinobuoshikiri buoyancyeffectofionicvacancyonthechangeofthepartialmolarvolumeinferricyanideferrocyanideredoxreactionunderaverticalgravityfield AT makotomiura buoyancyeffectofionicvacancyonthechangeofthepartialmolarvolumeinferricyanideferrocyanideredoxreactionunderaverticalgravityfield AT ryoichiaogaki buoyancyeffectofionicvacancyonthechangeofthepartialmolarvolumeinferricyanideferrocyanideredoxreactionunderaverticalgravityfield |