Surface Potential of Polycrystalline Hematite in Aqueous Medium
The surface potential of polycrystalline hematite in aqueous sodium perchlorate environment as a function of pH was examined. Surface potential of hematite was obtained from measured electrode potential of a nonporous polycrystalline hematite electrode. Acidic solution was titrated with base, and th...
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | International Journal of Electrochemistry |
| Online Access: | http://dx.doi.org/10.4061/2011/412731 |
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| _version_ | 1832567727771877376 |
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| author | Tajana Preočanin Filip Stipić Atiđa Selmani Nikola Kallay |
| author_facet | Tajana Preočanin Filip Stipić Atiđa Selmani Nikola Kallay |
| author_sort | Tajana Preočanin |
| collection | DOAJ |
| description | The surface potential of polycrystalline hematite in aqueous sodium perchlorate environment as a function of pH was examined. Surface potential of hematite was obtained from measured electrode potential of a nonporous polycrystalline hematite electrode. Acidic solution was titrated with base, and the backward titration with acid was performed. Substantial hysteresis was obtained which enabled location of the point of zero potential and equilibrium values of surface potentials. The theoretical interpretation of the equilibrium data was performed by applying the surface complexation model and the thermodynamic equilibrium constants for the first and the second step of surface protonation was obtained as logK1∘=11.3;logK2∘=2.8. |
| format | Article |
| id | doaj-art-5e464d91322d499592fc94dac228fdd7 |
| institution | Kabale University |
| issn | 2090-3537 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Electrochemistry |
| spelling | doaj-art-5e464d91322d499592fc94dac228fdd72025-02-03T01:00:37ZengWileyInternational Journal of Electrochemistry2090-35372011-01-01201110.4061/2011/412731412731Surface Potential of Polycrystalline Hematite in Aqueous MediumTajana Preočanin0Filip Stipić1Atiđa Selmani2Nikola Kallay3Laboratory of Physical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102A, 10000 Zagreb, CroatiaLaboratory of Physical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102A, 10000 Zagreb, CroatiaLaboratory of Physical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102A, 10000 Zagreb, CroatiaLaboratory of Physical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102A, 10000 Zagreb, CroatiaThe surface potential of polycrystalline hematite in aqueous sodium perchlorate environment as a function of pH was examined. Surface potential of hematite was obtained from measured electrode potential of a nonporous polycrystalline hematite electrode. Acidic solution was titrated with base, and the backward titration with acid was performed. Substantial hysteresis was obtained which enabled location of the point of zero potential and equilibrium values of surface potentials. The theoretical interpretation of the equilibrium data was performed by applying the surface complexation model and the thermodynamic equilibrium constants for the first and the second step of surface protonation was obtained as logK1∘=11.3;logK2∘=2.8.http://dx.doi.org/10.4061/2011/412731 |
| spellingShingle | Tajana Preočanin Filip Stipić Atiđa Selmani Nikola Kallay Surface Potential of Polycrystalline Hematite in Aqueous Medium International Journal of Electrochemistry |
| title | Surface Potential of Polycrystalline Hematite in Aqueous Medium |
| title_full | Surface Potential of Polycrystalline Hematite in Aqueous Medium |
| title_fullStr | Surface Potential of Polycrystalline Hematite in Aqueous Medium |
| title_full_unstemmed | Surface Potential of Polycrystalline Hematite in Aqueous Medium |
| title_short | Surface Potential of Polycrystalline Hematite in Aqueous Medium |
| title_sort | surface potential of polycrystalline hematite in aqueous medium |
| url | http://dx.doi.org/10.4061/2011/412731 |
| work_keys_str_mv | AT tajanapreocanin surfacepotentialofpolycrystallinehematiteinaqueousmedium AT filipstipic surfacepotentialofpolycrystallinehematiteinaqueousmedium AT atiđaselmani surfacepotentialofpolycrystallinehematiteinaqueousmedium AT nikolakallay surfacepotentialofpolycrystallinehematiteinaqueousmedium |