On the adsorption of sulfate on low Miller index Rh(hkl) electrodes: an in situ vibrational analysis
The adsorption of sulfate ion on Rh(111), Rh(100) and Rh(110) electrodes was studied using in situ FTIR reflection spectroscopy. For wavenumbers above 1200 cm-1, only one strong vibrational band is observed for adsorbed sulfate on the three low index rhodium surfaces. A weak band at 960 cm-1 is also...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2001-01-01
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| Series: | Journal of the Brazilian Chemical Society |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532001000200003 |
| _version_ | 1811281664529137664 |
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| author | Moraes Ines R. de Nart Francisco C. |
| author_facet | Moraes Ines R. de Nart Francisco C. |
| author_sort | Moraes Ines R. de |
| collection | DOAJ |
| description | The adsorption of sulfate ion on Rh(111), Rh(100) and Rh(110) electrodes was studied using in situ FTIR reflection spectroscopy. For wavenumbers above 1200 cm-1, only one strong vibrational band is observed for adsorbed sulfate on the three low index rhodium surfaces. A weak band at 960 cm-1 is also observed for Rh(111). The strong band above 1200 cm-1 is potential dependent with a tuning rate of 50 cm-1 V-1. No differences were observed upon changing the solution acidity in order to provide sulfate or bisulfate in solution. This result is interpreted in terms of complete dissociation of the ions, giving only adsorbed SO4(2-). The surface orientation affects only the amount of the adsorbed sulfate species. It seems that the same adsorbed sulfate is present on Rh(111), Rh(110) and Rh(100). |
| first_indexed | 2024-04-13T01:37:43Z |
| format | Article |
| id | doaj.art-93dcc208926b4feda78cc72f90a3016f |
| institution | Directory Open Access Journal |
| issn | 0103-5053 |
| language | English |
| last_indexed | 2024-04-13T01:37:43Z |
| publishDate | 2001-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Journal of the Brazilian Chemical Society |
| spelling | doaj.art-93dcc208926b4feda78cc72f90a3016f2022-12-22T03:08:19ZengSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society0103-50532001-01-01122138143On the adsorption of sulfate on low Miller index Rh(hkl) electrodes: an in situ vibrational analysisMoraes Ines R. deNart Francisco C.The adsorption of sulfate ion on Rh(111), Rh(100) and Rh(110) electrodes was studied using in situ FTIR reflection spectroscopy. For wavenumbers above 1200 cm-1, only one strong vibrational band is observed for adsorbed sulfate on the three low index rhodium surfaces. A weak band at 960 cm-1 is also observed for Rh(111). The strong band above 1200 cm-1 is potential dependent with a tuning rate of 50 cm-1 V-1. No differences were observed upon changing the solution acidity in order to provide sulfate or bisulfate in solution. This result is interpreted in terms of complete dissociation of the ions, giving only adsorbed SO4(2-). The surface orientation affects only the amount of the adsorbed sulfate species. It seems that the same adsorbed sulfate is present on Rh(111), Rh(110) and Rh(100).http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532001000200003electrochemical interfacesreflection spectroscopyadsorption |
| spellingShingle | Moraes Ines R. de Nart Francisco C. On the adsorption of sulfate on low Miller index Rh(hkl) electrodes: an in situ vibrational analysis Journal of the Brazilian Chemical Society electrochemical interfaces reflection spectroscopy adsorption |
| title | On the adsorption of sulfate on low Miller index Rh(hkl) electrodes: an in situ vibrational analysis |
| title_full | On the adsorption of sulfate on low Miller index Rh(hkl) electrodes: an in situ vibrational analysis |
| title_fullStr | On the adsorption of sulfate on low Miller index Rh(hkl) electrodes: an in situ vibrational analysis |
| title_full_unstemmed | On the adsorption of sulfate on low Miller index Rh(hkl) electrodes: an in situ vibrational analysis |
| title_short | On the adsorption of sulfate on low Miller index Rh(hkl) electrodes: an in situ vibrational analysis |
| title_sort | on the adsorption of sulfate on low miller index rh hkl electrodes an in situ vibrational analysis |
| topic | electrochemical interfaces reflection spectroscopy adsorption |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532001000200003 |
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