Modulated reflectance spectroscopy and voltammetry of the sulphide/gold system
- Autores
- Lezna, Reynaldo Oscar; Tacconi, Norma R. de; Arvia, Alejandro Jorge
- Año de publicación
- 1990
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The electroadsorption of sulphide species on gold and the growth of sulphur multilayers have been investigated by optical and electrochemical techniques in sodium tetraborate buffer as the supporting electrolyte (pH 7.0 and 9.2) at 25°C. Differential reflectance spectra indicate that the adsorption of sulphide begins inside the hydrogen evolution reaction (HER) region. The HER is catalysed by the presence of sulphide species on the electrode. During the growth of sulphur multilayers, soluble polysulphide species can be optically detected either as intermediates under diffusion-controlled kinetics or as products of a chemical reaction between sulphide ions and the deposited sulphur layer. The steep fall in the integral reflectance at 0.4 V (vs. SHE) is interpreted through the incorporation of light-absorbing polysulphides into the structure of the deposited sulphur layer.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Facultad de Ciencias Exactas - Materia
-
Ciencias Exactas
Química
Sulfuros
Técnicas Electroquímicas
Sodio
Electrólitos
Hidrógeno
Cinética química - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/87845
Ver los metadatos del registro completo
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Modulated reflectance spectroscopy and voltammetry of the sulphide/gold systemLezna, Reynaldo OscarTacconi, Norma R. deArvia, Alejandro JorgeCiencias ExactasQuímicaSulfurosTécnicas ElectroquímicasSodioElectrólitosHidrógenoCinética químicaThe electroadsorption of sulphide species on gold and the growth of sulphur multilayers have been investigated by optical and electrochemical techniques in sodium tetraborate buffer as the supporting electrolyte (pH 7.0 and 9.2) at 25°C. Differential reflectance spectra indicate that the adsorption of sulphide begins inside the hydrogen evolution reaction (HER) region. The HER is catalysed by the presence of sulphide species on the electrode. During the growth of sulphur multilayers, soluble polysulphide species can be optically detected either as intermediates under diffusion-controlled kinetics or as products of a chemical reaction between sulphide ions and the deposited sulphur layer. The steep fall in the integral reflectance at 0.4 V (vs. SHE) is interpreted through the incorporation of light-absorbing polysulphides into the structure of the deposited sulphur layer.Instituto de Investigaciones Fisicoquímicas Teóricas y AplicadasFacultad de Ciencias Exactas1990-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf319-336http://sedici.unlp.edu.ar/handle/10915/87845enginfo:eu-repo/semantics/altIdentifier/issn/0022-0728info:eu-repo/semantics/altIdentifier/doi/10.1016/0022-0728(90)87398-4info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:17:24Zoai:sedici.unlp.edu.ar:10915/87845Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:17:25.164SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Modulated reflectance spectroscopy and voltammetry of the sulphide/gold system |
| title |
Modulated reflectance spectroscopy and voltammetry of the sulphide/gold system |
| spellingShingle |
Modulated reflectance spectroscopy and voltammetry of the sulphide/gold system Lezna, Reynaldo Oscar Ciencias Exactas Química Sulfuros Técnicas Electroquímicas Sodio Electrólitos Hidrógeno Cinética química |
| title_short |
Modulated reflectance spectroscopy and voltammetry of the sulphide/gold system |
| title_full |
Modulated reflectance spectroscopy and voltammetry of the sulphide/gold system |
| title_fullStr |
Modulated reflectance spectroscopy and voltammetry of the sulphide/gold system |
| title_full_unstemmed |
Modulated reflectance spectroscopy and voltammetry of the sulphide/gold system |
| title_sort |
Modulated reflectance spectroscopy and voltammetry of the sulphide/gold system |
| dc.creator.none.fl_str_mv |
Lezna, Reynaldo Oscar Tacconi, Norma R. de Arvia, Alejandro Jorge |
| author |
Lezna, Reynaldo Oscar |
| author_facet |
Lezna, Reynaldo Oscar Tacconi, Norma R. de Arvia, Alejandro Jorge |
| author_role |
author |
| author2 |
Tacconi, Norma R. de Arvia, Alejandro Jorge |
| author2_role |
author author |
| dc.subject.none.fl_str_mv |
Ciencias Exactas Química Sulfuros Técnicas Electroquímicas Sodio Electrólitos Hidrógeno Cinética química |
| topic |
Ciencias Exactas Química Sulfuros Técnicas Electroquímicas Sodio Electrólitos Hidrógeno Cinética química |
| dc.description.none.fl_txt_mv |
The electroadsorption of sulphide species on gold and the growth of sulphur multilayers have been investigated by optical and electrochemical techniques in sodium tetraborate buffer as the supporting electrolyte (pH 7.0 and 9.2) at 25°C. Differential reflectance spectra indicate that the adsorption of sulphide begins inside the hydrogen evolution reaction (HER) region. The HER is catalysed by the presence of sulphide species on the electrode. During the growth of sulphur multilayers, soluble polysulphide species can be optically detected either as intermediates under diffusion-controlled kinetics or as products of a chemical reaction between sulphide ions and the deposited sulphur layer. The steep fall in the integral reflectance at 0.4 V (vs. SHE) is interpreted through the incorporation of light-absorbing polysulphides into the structure of the deposited sulphur layer. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas Facultad de Ciencias Exactas |
| description |
The electroadsorption of sulphide species on gold and the growth of sulphur multilayers have been investigated by optical and electrochemical techniques in sodium tetraborate buffer as the supporting electrolyte (pH 7.0 and 9.2) at 25°C. Differential reflectance spectra indicate that the adsorption of sulphide begins inside the hydrogen evolution reaction (HER) region. The HER is catalysed by the presence of sulphide species on the electrode. During the growth of sulphur multilayers, soluble polysulphide species can be optically detected either as intermediates under diffusion-controlled kinetics or as products of a chemical reaction between sulphide ions and the deposited sulphur layer. The steep fall in the integral reflectance at 0.4 V (vs. SHE) is interpreted through the incorporation of light-absorbing polysulphides into the structure of the deposited sulphur layer. |
| publishDate |
1990 |
| dc.date.none.fl_str_mv |
1990-04 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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http://sedici.unlp.edu.ar/handle/10915/87845 |
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http://sedici.unlp.edu.ar/handle/10915/87845 |
| dc.language.none.fl_str_mv |
eng |
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eng |
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info:eu-repo/semantics/altIdentifier/issn/0022-0728 info:eu-repo/semantics/altIdentifier/doi/10.1016/0022-0728(90)87398-4 |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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